Decide how many solutions this equation has:
x2 - 2x + 1 = 0

Answers

Answer 1
4.2 Solving x2+2x+1 = 0 by Completing The Square . This quadratic equation has one solution only.

Related Questions

Enter the correct answer in the box. The graph of a quadratic function is represented by the table. x f(x) 6 -2 7 4 8 6 9 4 10 -2 What is the equation of the function in vertex form? Substitute numerical values for a, h, and k.

Answers

The equation of the function in vertex form is f(x) = -2·(x - 8)² + 6

What is function?

Function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable.

here, we have,

The given values are

x,            f(x)

6,             -2

7,              4

8,              6

9,              4

10,            -2

The equation of the function in vertex form is given as follows;

f(x) = a × (x - h)² + k

To find the values of a, h, and k, we proceed as follows;

When x = 6, f(x) = -2

We have;

-2 = a × (6 - h)² + k = (h²-12·h+36)·a + k.............(1)

When x = 7, f(x) = 4

We have;

4 = a × ( 7- h)² + k = (h²-14·h+49)·a + k...........(2)

When x = 8, f(x) = 6...........(3)

We have;

6 = a × ( 8- h)² + k

When x = 9, f(x) = 4.

We have;

4 = a × ( 9- h)² + k ..........(4)

When x = 10, f(x) = -2...........(5)

We have;

-2 = a × ( 10- h)² + k

Subtract equation (1) from (2)

4-2 =  a × ( 7- h)² + k - (a × (6 - h)² + k ) = 13·a - 2·a·h........(6)

Subtract equation (4) from (2)

a × ( 9- h)² + k - a × ( 7- h)² + k

32a -4ah = 0

4h = 32

h = 32/4

  = 8

From equation (6) we have;

13·a - 2·a·8 = 6

-3a = 6

a = -2

From equation (1), we have;

-2 = -2 × ( 10- 8)² + k

-2 = -8 + k

k = 6

The equation of the function in vertex form is f(x) = -2·(x - 8)² + 6

To learn more on function click:

brainly.com/question/21145944

#SPJ9

Choose the property for each

Answers

Answer:

w = 12

Step-by-step explanation:

Simplifying equation:

To simplify the equation, we have to isolate 'w'. To isolate 'w',

  Add 21 to both sides of the equation.   Multiply both sides by 2.

     [tex]\dfrac{w}{2}-21=-15\\\\\\\dfrac{w}{2 }-21+21=-15+21 \ \text{\bf (Addition property of equality)}\\[/tex]

                    [tex]\dfrac{w}{2}= 6[/tex]

                [tex]2*\dfrac{w}{2}=6*2 \ \text{\bf (Multiplication property of equality)}\\\\\\[/tex]

                     w = 12

we play a game with a pot and a single die. the pot starts off empty. if the die roll is 1, 2 or 3, i put 1 pound in the pot, and the die is thrown again. if its 4 or 5, the game finishes, and you win whatever is in the pot. if its 6, you leave with nothing.

Answers

Your expected winnings from playing this game are 2 pounds.

What is a game?

A game is an activity or a form of play, often with a set of rules and goals, that is undertaken for enjoyment, competition, or skill development.

Let's analyze this game to see what your expected winnings are.

If the first roll is 1, 2, or 3, the game continues and you have a 3 in 6 chance (or 1/2 chance) of continuing to roll the die. Each subsequent roll has the same probabilities and outcomes as the first roll.

Let's start with the case where you win on the first roll with a probability of 1/2. In this case, your winnings are 1 pound.

If you don't win on the first roll, the game continues with a probability of 1/2, and your expected winnings from that point on are the same as your expected winnings from the beginning of the game (since the probabilities and outcomes are the same for all rolls).

Therefore, the expected winnings from the start of the game are:

E = 1/2 * 1 + 1/2 * E

Solving for E, we get:

E = 1 + E/2

E/2 = 1

E = 2

Therefore, your expected winnings from playing this game are 2 pounds.

Learn more about game here : brainly.com/question/26107008

#SPJ1

Which properties are true for all parallelograms?

Answers

The requried properties are true for all the parallelograms are,
1. Opposite sides are parallel     2. Opposite sides are congruent

What is parallelogram?

A parallelogram is a quadrilateral consisting of pairs of parallel sides.

The following properties are true for all parallelograms,
The opposite sides are parallel.
The Opposite sides are congruent.

All parallelograms have four congruent sides (property 1), four right angles (property 2), or exactly one pair of parallel sides (property 3). These properties only apply to specific types of parallelograms, such as rectangles or squares.

Learn more about parallelograms here:

https://brainly.com/question/903499

#SPJ9

Pet shelters typically have special adoption events for black cats and dogs, since their adoption rate is lower. One specific pet shelter (which has only cats and dogs) has 40% cats and 60% dogs. Twenty percent of the cats are black, and 10% of the dogs are black. The adoption percentage for black cats is 5%, and for black dogs is 10%. Cats that are not black are equally likely to be adopted as not adopted, and this is the same for dogs that are not black. For (b)-(f), write the probability statement and then calculate your answer.
a) Draw the probability tree and label all events and probabilities in it.
b) What is the probability that a randomly chosen animal is not black, a dog, and is adopted?
c) What is the probability that a randomly chosen animal is black, a cat, and is not adopted?
d) What is the probability that a randomly chosen animal is adopted?
e) Suppose a randomly chosen animal is a cat, what is the probability that it is adopted?
f) Suppose a randomly chosen animal is adopted, what is the probability that it is a cat?

Answers

a) The pet shelter has 40% cats (20% black, 5% adopted), and 60% dogs (10% black, 10% adopted). 50% are adopted in non-black cats and dogs, b) 0.45, c) 0.19, d) 0.15, e) 0.375, f) 0.6.

a) The probability tree would seem like this:

P(Cat) = 40%

P(Black Cat) = 20%

P(Adopted Black Cat) = 5%

P(Not Adopted Black Cat) = 95%

P(Not Black Cat) = 80%

P(Adopted Not Black Cat) = 50%

P(Not Adopted Not Black Cat) = 50%

P(Dog) = 60%

P(Black Dog) = 10%

P(Adopted Black Dog) = 10%

P(Not Adopted Black Dog) = 90%

P(Not Black Dog) = 90%

P(Adopted Not Black Dog) = 50%

P(Not Adopted Not Black Dog) = 50%

b) P ( Adopted & Not Black Dog ) = P(Not Black Dog) x P(Adopted | Not Black Dog) = 0.90 * 0.50 = 0.45

c) P(Not Adopted & Black Cat) = P(Black Cat) x P(Not Adopted | Black Cat) = 0.20 * 0.95 = 0.19

d) P(Adopted) = P(Adopted Black Cat) + P(Adopted Not Black Cat) + P(Adopted Black Dog) + P(Adopted Not Black Dog) = 0.05 + 0.50 + 0.10 + 0.50 = 0.15

e) P(Adopted | Cat) = P(Adopted & Cat) / P(Cat) = (0.05 + 0.50) / 0.40 = 0.375

f) P(Cat | Adopted) = P(Cat & Adopted) / P(Adopted) = (0.05 + 0.50) / 0.15 = 0.6.

To learn more about probability,

brainly.com/question/11234923

#SPJ4

The measure of one angle of a right triangle is 26°. Find the measure of the other angle.
Enter an integer or decimal number [more...]
Question Help:
Post to forum
Calculator

Answers

Answer:

64°

Step-by-step explanation:

the sum of the 3 angles in a triangle = 180°

let the third angle be x , then

x + 90° + 26° = 180°

x + 116° = 180° ( subtract 116° from both sides )

x = 64°

the other angle is 64°

two similar triangles have a ratio of sides of 3:4 if one side of the small triange is 9 inches long how long is the corresponding side of the larger triange

Answers

Answer:

The answer to the question is Sixteen.

can you please solve?

Answers

The equation of the line is y = (2/3)x + 20/3.

What is an equation of a line?

The equation of a line is given by:

y = mx + c

where m is the slope of the line and c is the y-intercept.

Example:

The slope of the line y = 2x + 3 is 2.

The slope of a line that passes through (1, 2) and (2, 3) is 1.

We have,

The equation has:

Slope = 2/3

Passes through the line (-4, 4).

Now,

The equation of the line is y = mx + c.

m = 2/3

Consider (-4, 4) = (x, y)

So,

4 = (2/3)(-4) + c

4 = -8/3 + c

c = 4 + 8/3

c = (12 + 8) / 3

c = 20/3

Now,

y = (2/3)x + 20/3

Thus,

The equation of the line is y = (2/3)x + 20/3.

Learn more about equation of a line here:

https://brainly.com/question/23087740

#SPJ1

Translate this sentence into an equation.
Chau's savings increased by 17 is 54.

Answers

Answer: 17x = 54

x represents chau's savings before it increased

What is the slope of the line?

Answers

Answer:

The slope is 3.

Step-by-step explanation:

You can find this by using rise/run.

The line goes from (1,2) to (2,5).

The rise for this is 3 and the run is 1.

3/1 is 3, therefore the slope is 3

What is the product of 2.5\times 10^22.5×10
2
and 3.7 \times 10^53.7×10
5
expressed in scientific notation?

Answers

The solution is, the product is 9.25* 10^83.2.

What is  multiplication?

In mathematics, multiplication is a method of finding the product of two or more numbers. It is one of the basic arithmetic operations, that we use in everyday life.

here, we have,

2.5\times 10^22.5×10^2 and 3.7 \times 10^53.7×10^5

=2.5* 10^22.5×10^2 × 3.7 * 10^53.7×10^5

=9.25* 10^24.5*10^58.7

=9.25* 10^83.2

Hence, The solution is, the product is 9.25* 10^83.2.

To learn more on multiplication click:

brainly.com/question/5992872

#SPJ9

Problem 6. Determine if the pair of planes is parallel or intersecting. If they are parallel, find the distance between them. If they intersect, find a parametrization for the line of intersection. 1. 3.x + 2y +z = 8 and x + 3y – z = 5. 2. 2.c – y +z = 4 and 4.0 – 2y + 2z = 3.

Answers

1. To determine if the pair of planes 3x + 2y + z = 8 and x + 3y – z = 5 are parallel or intersecting, we can check if their normal vectors are parallel or not.

The normal vector of the first plane is <3, 2, 1>, and the normal vector of the second plane is <1, 3, -1>. These normal vectors are not parallel, so the planes intersect at a line.

To find a parametrization for the line of intersection, we can set one of the variables to be a parameter and solve for the other two. Let's choose z as the parameter.

From the second plane equation, we have z = x + 3y - 5. Substituting this into the first plane equation, we get: 3x + 2y + (x + 3y - 5) = 8

Simplifying, we get: 4x + 5y = 13

Solving for y in terms of x, we get: y = (13 - 4x) / 5

So a parametrization for the line of intersection is: x = t

y = (13 - 4t) / 5, z = t + 3((13 - 4t) / 5) - 5 = (2t + 2) / 5

2. To determine if the pair of planes 2c – y + z = 4 and 4c – 2y + 2z = 3 are parallel or intersecting, we can again check if their normal vectors are parallel or not.

The normal vector of the first plane is <2, -1, 1>, and the normal vector of the second plane is <4, -2, 2>. These normal vectors are parallel (in fact, they are scalar multiples of each other), so the planes are parallel.

To find the distance between the two parallel planes, we can take any point on one plane and find its distance to the other plane. Let's choose the point (0, 0, 4) on the first plane. The distance between this point and the second plane is: |4c - 2(0) + 2(4) - 3| / sqrt(4^2 + (-2)^2 + 2^2) = |4c - 5| / 2sqrt(6)

So the distance between the two parallel planes is |4c - 5| / 2sqrt(6).

You can read more about parametrization at https://brainly.com/question/20300313

#SPJ4

help me on this question plss

Answers

Therefore, the chef got 3 bags of red onions (3 x 4 = 12 onions) and 2 bags of yellow onions (2 x 7 = 14 onions).

HELP PLEASE! Find the surface area of the composite shape. Round to the nearest tenth.

Answers

The surface area of the composite figure is 415. 25 in²

How to determine the surface area of the composite structure

From the image shown, we can see that the figure is made up of a cuboid and a semicircle.

The formula for calculating the surface area of a cuboid is given as;

Surface area =2lw+2lh+2hw

Given that, l is the length, h is the height and w, the width.

Surface area = 2(6×10) + 2(6×8) + 2(8 × 10)

expand the brakect

Surface area = 120 + 96+ 160

Surface area = 376 in²

Surface area of a semicircle = 1/2(πr2 ),

Substitute the values

Surface area = 1/2 ×22/7 ×5² = 39.25 in²

Hence, the value is the sum of the surface areas

Learn about surface area on: https://brainly.com/question/76387

#SPJ1

Each class you create becomes a new ______ that can be used to declare variables and create objects. a. package b. instance c. library d. type. ANS: d. type.

Answers

The rate of return is an important measure of an investment's performance and is calculated by dividing the net investment income by the initial investment.

The formula for calculating a rate of return is expressed as the net investment income divided by the initial investment (ROI = (Gain from Investment – Cost of Investment) / Cost of Investment). To calculate the rate of return, you need to first determine the net investment income by subtracting the cost of investment from the gain from investment. Then, divide this number by the cost of investment and multiply it by 100 to convert it into a percentage. For example, if you invest $1000 and you make a total of 1200 back, your rate of return is 20%. This is calculated by subtracting the cost of investment (1000) from the gain (1200), resulting in a net income of 200. Then, divide $200 by the cost of investment (1000) to get 0.2 and multiply it by 100 to get a rate of return of 20%.

The rate of return is an important measure of an investment's performance and is calculated by dividing the net investment income by the initial investment.

Learn more about net income here:

https://brainly.com/question/7619606

#SPJ4

Un cubo tiene un volumen de 8 Metro cúbicos .¿cual es la longitud de una arista del cubo ? Muestra cómo hallasteis tu respuesta

Answers

The edge of the cube is equal to 2 m³.

Quadrilaterals

There are different quadrilaterals, for example: square, rectangle, rhombus, trapezoid and parallelogram.  Each type is defined accordingly to its length of sides and angles. For example,  in a square, all angles are 90° and all sides present the same value.

A square is a 2D figure, when the square is associated with a 3D figure, the figure is called a cube.

The cube presents 6 faces with length (l), height (h) and width (w) equal. Thus, the cube presents congruent edges. The volume is given from the formula V=a³, where a is a congruent edge.

The exercise gives the volume of the cube 8m³. As presented previously, the edges of the cube are congruent and the formula by the volume is V=a³. Thus,

V=a³

8=a³

[tex]\sqrt[3]{a^3}[/tex]=[tex]\sqrt[3]{8}[/tex]

a=[tex]\sqrt[3]{2^3}[/tex]

a=2 m

Learn more about the cube here:

https://brainly.com/question/19891526

#SPJ1

Mark had 5/6 as many birds stickers as bear stickers at first. After buying another 20 stickers of each type, he has 7/8 as many bird stickers as bear stickers. How many of each type of stickers did mark have at first?

Answers

Mark had 480 bear stickers and 400 bird stickers at first.

What is word problem?

A word problem in math is a math question written as one sentence or more that requires children to apply their math knowledge to a 'real-life' scenario.

Given that, Mark had 5/6 as many birds stickers as bear stickers at first. After buying another 20 stickers of each type, he has 7/8 as many bird stickers as bear stickers.

We are asked to find the number of each type of stickers did mark have at first.

Let Mark have x bear stickers at first,

Therefore,

Bird sticker = 5x/6

5x/6 + 20 = 7x/8

Multiply the equation by 48

40x + 960 = 42x

2x = 960

x = 480

5x/6 = 400

Hence, Mark had 480 bear stickers and 400 bird stickers at first.

Learn more about word problems, click;

https://brainly.com/question/29203255

#SPJ9

Write two fractions that are equivalent to 4/6 ​

Answers

Answer:

2/3, 8/12

Step-by-step explanation:

(4 divided by 2)/(6 divided by 2) = 2/3

(4 times 2)/(6 times 2)= 8/12

Multiply/Divide the numerator and the denominator by the same number

There are infinte equivalent fractions to 4/6! 4000/6000 is one!

Please make me Brainliest! Hope that helps!

point B is 2 root 5 units from A and is on the intersection of two gridlines write the co-ordniates of both positions of point B

Answers

The coordinates of both positions of point B is (2√5,0) and B2: (0,2√5).

What is y-intercept of a function?

The intersection of the graph of the function with the y-axis gives y-intercept of that function. The y-intercept is the value of y on the y-axis at which the considered function intersects it.

Assume that we've got: y = f(x)

At y-axis, we've got x = 0, so putting it will give us the y-intercept.

Thus, y-intercept of y = f(x) is y = f(0)

We are given that;

Point b=  2 root 5 units

Now,

Since point B is 2√5 units away from point A, we can draw two circles with radius 2√5 centered at point A. The two intersections of these circles with the gridlines will give us the two possible positions of point B.

For example, if point A has coordinates (0,0) and the gridlines are the x-axis and y-axis, then the two possible positions of point B are:

B1: (2√5,0) - the intersection of the circle with the positive x-axis

B2: (0,2√5) - the intersection of the circle with the positive y-axis

If the gridlines are different, then the positions of point B will be different.

Therefore, by the intercept the answer will be (2√5,0) and B2: (0,2√5).

Learn more about y-intercept here:

https://brainly.com/question/16540065

#SPJ1

The line segment joining the points P(-3,2) and Q(5,7) is divided by the y-axis in the ratio:

Answers

Answer:

Step-by-step explanation:

The line segment joining two points P and Q can be represented by the equation of a straight line in the form y = mx + b, where m is the slope and b is the y-intercept.

To find the equation of the line, we need to find the slope, which can be calculated using the formula:

m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are the coordinates of the points P and Q, respectively.

In this case, the coordinates are:

P = (-3, 2) and Q = (5, 7)

So, the slope is:

m = (7 - 2) / (5 - (-3)) = 5 / 8

Next, we can use either of the points to find the y-intercept. Let's use point P:

b = y - mx, where y and x are the y and x coordinate of the point, respectively.

In this case,

b = 2 - m * (-3) = 2 - (5/8) * (-3) = 2 + 15/8 = 89/8

So, the equation of the line joining the points P and Q is:

y = (5/8)x + 89/8

Now, to find the point where the line crosses the y-axis, we need to find the x-coordinate of the point where y = 0.

So, we have:

0 = (5/8)x + 89/8

Solving for x, we get:

x = -(89/8) / (5/8) = -89 / 5

This means that the line crosses the y-axis at the point (-89/5, 0). To find the ratio in which the line segment is divided by the y-axis, we need to find the ratio of the distance from the y-axis to point P to the distance from the y-axis to point Q.

Let's call the point of intersection with the y-axis R. The distances are then:

PR = (3, 2) and QR = (5 - (-89/5), 7)

The ratio of the distances is then:

PR / QR = (3, 2) / (5 - (-89/5), 7) = 3 / (5 + 89/5) = 3 / (94/5) = 15/47

So, the line segment joining the points P and Q is divided by the y-axis in the ratio 15:47.

A colony of bacteria doubles every 12 hours.
a. Write an exponential function that represents the population of the bacteria after t
hours?
b. If the colony had 400 bacteria after 4 days, how many bacteria were there?

Answers

a) The exponential function that represents the population of the bacteria after t hours is given as follows:

y = a(2)^(t/12). (a is the initial amount).

b) The initial amount is given as follows: a = 2.

How to model the exponential function?

The standard definition of an exponential function is given as follows:

y = a(b)^(x/n).

In which:

a is the initial amount.b is the rate of change.n is the time needed for the rate of change.

Considering that the colony doubles in 12 hours, the parameters b and n are given as follows:

b = 2, n = 12.

Hence the function is defined as follows:

y = a(2)^(t/12).

After 4 days = 96 hours, there are 400 bacteria, hence the initial amount is obtained as follows:

400 = a(2)^(96/12)

256a = 400

a = 400/256

a = 2. (rounding).

More can be learned about exponential functions at https://brainly.com/question/30113628

#SPJ1

A
group of four students is performing an
experiment with salt. Each student must
add teaspoon of salt to a solution. The
group only has a -teaspoon measuring
poon. How many times will the group
Need to fill the measuring spoon in order
To perform the experiment?

Answers

The number of times the group need to fill the measuring spoon in order to perform the experiment is 12 times

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

Let the amount of teaspoon of salt added to the solution be = ( 3/8 ) of spoon

Let the number of students = 4 students

The group only has ( 1/8 ) teaspoon measuring spoon

Substituting the values in the equation , we get

So , the amount of teaspoon of salt added to the solution by one student = amount of teaspoon of salt added to the solution / ( 1/8 )

On simplifying the equation , we get

The amount of teaspoon of salt added to the solution by one student = ( 3/8 ) / ( 1/8 )

The amount of teaspoon of salt added to the solution by one student = 3 times

And , the number of times the salt is added by 4 students = 4 x 3 = 12 times

Hence , the number of times is 12

To learn more about equations click :

https://brainly.com/question/19297665

#SPJ9

Richard used a radius measure of a circle to be 3.6 inches when he calculated the area of a circle. The correct radius measure was actually 3.5 inches. What is the difference between Richard’s measured area of the circle and the actual area of the circle?

a. 0.1π square inches

b. 0.71π square inches

c. π square inches

d. 0 square inches

e. 2.4 square inches

Answers

As a result, the answer is (e) 2.4 square inches, which is the difference between Richard's measured and real circle area.

What is area?

In mathematics, area is a measure of the amount of space occupied by a two-dimensional object, such as a rectangle, triangle, circle, or any other shape. It's a scalar quantity that describes the size of a region in two-dimensional space. The units of area are typically square units, such as square inches, square centimeters, square meters, etc. In general, the area of a shape is a measure of how much space it occupies, and it is an important concept in geometry, engineering, and many other fields.

Here,

The formula for the area of a circle is given by:

A = πr²

Where r is the radius of the circle.

Using the incorrect radius of 3.6 inches, the calculated area would be:

A = π * (3.6 inches)² = 40.44 square inches

Using the correct radius of 3.5 inches, the actual area would be:

A = π * (3.5 inches)² = 38.5 square inches

So, the difference between Richard's measured area of the circle and the actual area of the circle would be:

40.44 square inches - 38.5 square inches = 1.94 square inches

Therefore, the answer is (e) 2.4 square inches that is the difference between Richard’s measured area of the circle and the actual area of the circle.

To know more about area,

https://brainly.com/question/22469440

#SPJ1

According to AAA ('Triple' A), the median amount that Americans spent over the 2012 Labor Day Holiday was $761.00. Consider the pie chart below.

A -- Fuel Transportation
B -- Other Transportation
C -- Food and Beverage
D -- Shopping
E -- Entertainment/Recreation
F -- Hotel
G -- Other
Express your answers rounded to the nearest cent.

a). How much money did the average American spend on Food & Beverage over the 2012 Labor Day Holiday?

b). How much money did the average American spend on Entertainment/Recreation over the 2012 Labor Day Holiday?

c). How much more money did the average American spend on Food & Beverage than on Entertainment/Recreation over the 2012 Labor Day Holiday?

Answers

a. The average American spend on Food & Beverage is $152.2. b. The average American spend on Entertainment/Recreation is $98.93. c. They spent $53.27 more on food than on entertainment.

What is pie chart?

In order to show mathematical issues, the "pie chart," often referred to as a "circle chart," divides the circular statistical visual into sectors or portions. A proportionate amount of the entire is indicated by each sector. The Pie-chart is now the most effective method for determining the composition of something. Pie charts typically take the role of other graphs, such as bar graphs, line plots, histograms, etc.

Given that, the average American spent $761.00.

a. Money spent on Food and Beverages is:

F = 761(20/100) = $152.2

b. Money spent on Entertainment is:

E = 761(13/100) = $98.93

c. The money spent on food is more than entertainment by:

A = 152.2 - 98.93 = $53.27

Hence, a. The average American spend on Food & Beverage is $152.2. b. The average American spend on Entertainment/Recreation is $98.93. c. They spent $53.27 more on food than on entertainment.

Learn more about pie chart here:

https://brainly.com/question/9979761

#SPJ1

A bakery sold 105 cupcakes in one day. The head baker predicted he would sell 85 cupcakes that day. What was the percent error of the baker's prediction?

Answers

There was 19% percent error of the baker's prediction.

What is a percent error?

Percent error is the difference between the estimated value and the actual value in comparison to the actual value and is expressed as a percentage.

Given that, a bakery sold 105 cupcakes in one day, the head baker predicted he would sell 85 cupcakes that day.

We are asked to find the percent error of the baker's prediction,

Percent error = |expected value - exact value| / exact value × 100 %

The expected value is the prediction of the Chef = 85

The exact value = 105

Percent error = |85-105| / 105 × 100 %

= 20/105 × 100 %

= 19%

Hence, there was 19% percent error of the baker's prediction.

Learn more about percent error, click;

https://brainly.com/question/28992565

#SPJ9

A student attaches a 3.0 kg mass to a spring with a spring constant of 40 N/m. The student compresses the spring to the left by 0.15 m and then releases the mass allowing it to oscillate. Which of the following equations best describes the position vs. time relationship?
A. x = (3.0 kg) cos (1.42 t)
B. x = (-15 m) cos (1.42 t)
C. x = (-40 N/m) cos (2πt)
D. x = (-0.15 m) cos (3.65 t)

Answers

The position vs. time connection is best described by equations is [tex]& -(0.15 \mathrm{~m}) \cos (3.65) t[/tex] .

From the given data,

A student attaches a 3.0 kg mass to a spring with a spring constant of 40 N/m.

The student compresses the spring to the left by 0.15 m and then releases the mass allowing it to oscillate.

The position of the mass for the spring- mass oscillatory system is,

[tex]$x=A \cos \omega t$[/tex]

Where

ω = angular frequency of the wave.T = time period of the wave.

The angular frequency of the system is,

The angular frequency refers to the angular displacement of any wave element per unit of time or the rate of change of the waveform phase.

[tex]$$\omega=\sqrt{\frac{k}{m}}$$[/tex]

Therefore, equation (1) changes as follows

[tex]x & =A \cos \left(\sqrt{\frac{k}{m}}\right) t \\[/tex]

[tex]& =-(0.15 \mathrm{~m}) \cos \left(\sqrt{\frac{40 \mathrm{~N} / \mathrm{m}}{3.0 \mathrm{~kg}}}\right) t \\[/tex]

[tex]& =-(0.15 \mathrm{~m}) \cos (3.65) t[/tex]

Therefore, the position vs. time connection is best described by equations is [tex]& -(0.15 \mathrm{~m}) \cos (3.65) t[/tex] .

For more such questions on angular frequency

https://brainly.com/question/13883617

#SPJ4

Find the equation to the plane through the point (−1,3,2) and perpendicular to the planes x+2y+2z=11 and 3x+3y+2z=15.

Answers

The equation of the plane that passes through (-1, 3, 2) and is perpendicular to the planes x + 2y + 2z = 11 and 3x + 3y + 2z = 15 is -2x + 4y - 3z - 17 = 0

In geometry, a plane is a flat, two-dimensional surface that extends infinitely in all directions. A plane can be defined by an equation in the form of ax + by + cz = d, where a, b, and c are coefficients that determine the plane's orientation and d is a constant.

To find the equation of a plane, we need to know its normal vector, which is a vector perpendicular to the plane. We can find the normal vector of the plane we are looking for by taking the cross product of the normal vectors of the two given planes.

The normal vector of the first plane, x + 2y + 2z = 11, is (1, 2, 2), and the normal vector of the second plane, 3x + 3y + 2z = 15, is (3, 3, 2). To take their cross product, we can use the following formula:

n = (a₂b₃ - a₃b₂, a₃b₁ - a₁b₃, a₁b₂ - a₂b₁)

where n is the normal vector, and a and b are the two given normal vectors. Plugging in the values, we get:

n = (2(2) - 2(3), 2(3) - 1(2), 1(3) - 2(3)) = (-2, 4, -3)

This means that the normal vector of the plane we are looking for is (-2, 4, -3). We also know that the plane passes through the point (-1, 3, 2), so we can use the point-normal form of the equation of a plane, which is:

a(x - x₀) + b(y - y₀) + c(z - z₀) = 0

where (x₀, y₀, z₀) is the given point, and a, b, and c are the coefficients of the normal vector. Plugging in the values, we get:

-2(x + 1) + 4(y - 3) - 3(z - 2) = 0

Simplifying, we get:

-2x + 4y - 3z - 17 = 0

To know more about equation here.

https://brainly.com/question/10413253

#SPJ4

1. 3mm : 1cm= what is the ratio​

Answers

The equivalent ratio to the given expression 3mm : 1cm as required in the task content is; 3 : 10.

What is the equivalent ratio of 3mm : 1cm?

It follows from the task content that the equivalent ratio of 3mm : 1cm is to be determined .

Recall, 1cm is equivalent to 10 mm.

On this note, the given ratio can be written as; 3mm : 10 mm.

Consequently, the ratio which is equivalent to the given expression is; 3 : 10.

Read more on equivalent ratios;

https://brainly.com/question/13513438

#SPJ1

Jacy keeps track of the amount of average monthly rainfall in her hometown. She determines that the average monthly rainfall can be modeled by the function ...where ...represents the average monthly rainfall in centimeters and ... represents how many months have passed. If ... represents the average rainfall in July, in which months does Jacy’s hometown get at least 10.5 centimeters of rainfall? Show all of your algebraic reasoning to support your final answer.

Answers

Answer:

  September, October, November

Step-by-step explanation:

When monthly rainfall in centimeters is represented by A(t) = 2.3sin(πt/6)+9.25 and A(0) represents July's rainfall, you want to know the months in which average rainfall is at least 10.5 cm.

Inequality

We want to find the values of t that make A(t) ≥ 10.5:

  2.3sin(πt/6) +9.25 ≥ 10.5

  2.3sin(πt/6) ≥ 1.25 . . . . . . subtract 9.25

  sin(πt/6) ≥ 0.543478 . . . . divide by 2.3

  πt/6 ≥ 0.574575 . . . . . . . take inverse sine

  t ≥ 1.097

The sine function is symmetrical about π/2, so this also means solutions will be of the form ...

  πt/6 ≤ π -0.574575

  t ≤ 6 -1.097 ≈ 4.903

Months

The month numbers that will have rainfall at least 10.5 cm will fall in the range ...

  1.097 ≤ t ≤ 4.903

  t ∈ {2, 3, 4}

If July is month 0, then these months are September, October, November.

Jacy's hometown will get at least 10.5 cm of rain in September, October, and November.

__

Additional comment

The attachment confirms this result. We have shifted the rainfall function so it can use conventional month numbers. It shows months 9, 10, 11 have rainfall above 10.5 cm.

<95141404393>

Find two different sets of parametric equations for the rectangular equation. (Select all that apply.) y = 8x + 7 O x= t; y = 7t + 8 x = t; U y = 8t + 7 O x = 8t, y = +7 Ox=t, y = 1 8t + 7 Oxat y=t+7 Ox=t+7, y = 8t

Answers

Sets of parametric equations for the rectangular equation are x=t and y=8t+7.

What is a parametric equation?

A parametric equation has the variables x and y expressed in terms of t which is the third independent variable.

The rectangular equation is [tex]y = 8x + 7[/tex].

If we denote the variable x by t.

Then, we can say that x=t

The parametric equation can be formed by replacing x with t in the rectangular equation [tex]y=8x+7[/tex].

Therefore, sets of parametric equations for the rectangular equation are x=t and y=8t+7.

Learn more about parametric equations here:

https://brainly.com/question/27247899

#SPJ1

Other Questions
WILL GIVE BRAINLIESTWhich of these powers is granted to the federal government alone?A: try crimes that occur in a municipalityB: levy taxes on imported goodsC: levy a sales tax on state purchasesD: declare war or make treaties What is the area and perimeter of semicircle? what are the minimum and maximum side lengths to complete a triangle with two side lengths of 18 cm and 21 cm When did modern poetry begin? Deloria points out the corrupt narrative surrounding Wounded Knee by comparing the Medals of Honor given out to the_______7th Cavalry on that day to the 3 that were awarded to the more than 64,000 South Dakotans who fought in World War II. A. 12 B. 35 C. 18 D. 7 E. 26 Read the statement. [Blank] is a type of medical test that looks for changes in chromosomes, genes, and proteins. Which option correctly completes this sentence?A Genetic modificationB Genetic screeningC Genetic selection D Genetic engineering Scenario: It cost $5 to Roller Skate for 2 hours at Empire Roller Skating ring.Identify the cost per hour for this recreational activity in the scenario (Unit Rate) what unesco world heritage site in southern india crossword clue? Kim was elected prefect of his school and was proud to serve his school. However, there were students that were always coming late, He had allowed them into the school as they had given him good excuses for being late. When this went on for some time, he put them on detention. As a result, they started calling him names behind his back and spent much of their time making fun of other students who worked on detention. Kim then reported them to the principal, and they were suspended for a week. i) Was Kim being fair in reporting the students? Why/why not? ii) Why were the students making fun of the others on detention. iii) Was the decision made by the principal reasonable? Why/why not? Information must be encoded and ___ in order to be retrieved later hugo van der goes patron the portinari family and jan van eycks patron giovanni arnolfini are connected through what italian family Phoebe used the following source to write her research paper.Volcansik, Roberta. "Leadership Among Teens." The Leadership Journal, 35, 3, 2015, p. 128.Which sentence cites the source correctly according to MLA guidelines? A. In "Leadership Among Teens," there is a persuasive claim that all students a spark within them that can help them lead other people (Vocansik 128). B. According to Roberta Volcansik, even teens who do not show signs of being active leaders can develop their leadership potential (The Leadership Journal). C. In "Leadership Among Teens," Roberta Volcansik claims that teens display "signs of the types of leaders they will be when they are adults" (128). D. Roberta Volcansik notes that the idea that only people who are talkative and persuasive become leaders is a narrow view of leadership ("Leadership Among Teens"). Using the image and your knowledge, besides the desire to defeat an established European power, what other strategic factor led to American imperialism in the late 19th century?ResponsesA The need to prevent the expansion of totalitarian forces led the U.S. military action.The need to prevent the expansion of totalitarian forces led the U.S. military action.B The desire to spread freedom and democracy compelled Roosevelt to use military force.The desire to spread freedom and democracy compelled Roosevelt to use military force.C The need for more markets and raw materials led the U.S. to become imperialistic.The need for more markets and raw materials led the U.S. to become imperialistic.D The fear of expansionistic foreign powers compelled the McKinley to strike first. A recessive allele in mice results in an abnormally long neck. Sometimes, during early embryonic development, the abnormal neck causes the embryo to die. An experimenter began with a population of true-breeding normal mice and true-breeding mice with long necks. Crosses were made between these two populations to produce an F1 generation of mice with normal necks. The F1 mice were then mated to each other to obtain an F2 generation. For the mice that were born alive, the following data were obtained:522 mice with normal necks 62 mice with long necks. What percentage of homozygous mice (that would have had long necks if they had survived) died during embryonic development? Assume that your body mass index (BMI) program calculated a BMI of 41.6. What would be the value ofcategory after this portion of the program was executed?# Determine the weight category.if BMI < 18.5:category= "underweightelif BMI > 39.9:category="morbidly obese"elif BMI n people line up to board a plane. each has a boarding pass with assigned seat. however, the first person has lost the boarding pass and takes a random seat uniformly. after that, each person takes the assigned seat if it is unoccupied, and one of unoccupied seats uniformly at random otherwise. denote by pnthe probability that the last person to board sits in the assigned seat. show that pn PLEASE HELP WILL GIVE BRAINLIESThelp with this proof please image attached How does the phrase the weed were evolving in line 18 to the meaning of the article Graph the function f(x) = 3x -2. corporations differ from partnerships and other forms of business association in two ways. one of these is that