Answer:
D. 9/20 = 45/100
Step-by-step explanation:
9x5=45
20x5=100
Answer:
D
Step-by-step explanation:
If you times 9 and 20 by 5, 9 will equal 45 and 20 will equal 100
Find the mean of the following data set.
42, 45, 58, 63
52
42
47
Answer:
~49.9
Step-by-step explanation:
To get the mean, we must add all the numbers then divide by the amount of numbers there were.
42 + 45 + 58 + 63 + 52 + 42 + 47 = 349
Since we have 7 numbers we can do
349/7 ~ 49.9
Answer: 49.8 (50 if rounded to the nearest ones place)
Step-by-step explanation: First, let's put the number from greatest to least...and we also have to add all the numbers...
42 + 42 + 45 + 47 + 52 + 58 + 63 = 349
Lastly, we have to divide the total by how many numbers there are on the data set...there's 7
349 ÷ 7 = 49.8 (50 if rounded to the nearest ones place)
Therefore, the mean is 49.8 or 50, I hope this helps!
If 4x^2 – bx + 81 is a perfect square trinomial. Then the value of b is
Answer:
b = 36
Step-by-step explanation:
perfect square: a² - 2ac + c²
4x²- bx + 81 = (2x)² - bx + 9² = (2x)² - 2*(2x)*(9) +9²= (2x)² - 36x +9²,
so b = 36
Pls help. im have such a bad day.
Solve.
2x + 1 = 3x – 4
A.x = 1
B.x = 5
C.x = –5
D.x = –1
Answer:
b
Step-by-step explanation:
The school has t-shirts to hand out. They have 10 hot pink shirts, 6 neon green shirts, 9 bright yellow shirts, and 11 vibrant blue shirts. If you are handed a shirt at random, what is the probability you will be given a vibrant blue shirt?
11/36
10/36
11%
1/4
Answer:11/36
Step-by-step explanation:there are 36 shirts in total and only 11. So you have an 11/36 chance
PLEASE HELP URGENT
Suppose that the functions r and s are defined for all real numbers x as follows.
r(x) = x + 5
s(x) = 3x + 1
Write the expressions for (r * s)(x) and (r + s)(x) and (r - s)(4) evaluate .
Answer:r*s = 168
Step-by-step explanation: (2x-1)(6x) = 12 x^2 - 6x
r(s(x)) = 2 (6x) - 1 = 12 x - 1
r(x) - s(x) = (2x-1) - 6x = -4x -1
r(x) = s(x) when 2x-1 = 6x or x = -1/4
r(4) = s(4) never
(r*s)(4) = 12 x^2 - 6 x = 12*16 - 24 =168
1
Andrea has 3 tiles.
One is a regular octagon, one is a regular pentagon
and one is a regular hexagon.
Andrea thinks the 3 tiles will fit together perfectly,
as shown in the diagram.
Show calculations to prove that she is wrong.
Andrea is incorrect. Given 3 tiles will not fit together perfectly.
Angles formed at a point: Sum of all angles around a point is 360°.
As shown in the picture,
If the tiles join perfectly at a point, sum of all angles around the joining point should be 360°.
Expression for the measure of the interior angle of a polygon,
Interior angle of a polygon = [tex]\frac{(n-2)\times 180^\circ}{n}[/tex]
Interior angle of a pentagon = [tex]\frac{(5-2)\times 180^\circ}{5}=108^\circ[/tex]
Interior angle of a hexagon = [tex]\frac{(6-2)\times 180^\circ}{6}=120^\circ[/tex]
Interior angle of an octagon = [tex]\frac{(8-2)\times 180^\circ}{8}=135^\circ[/tex]
To prove that the given tiles fit together perfectly → Sum of all the angles around the common point should be 360°
Sum of all interior angles = 108° + 120° + 135°
= 363°
Therefore, given tiles will not fit together perfectly.
Learn more about the interior angles of a polygon here,
https://brainly.com/question/12871621?referrer=searchResults
F(x)=x^2 what is g(x)?
Answer:
B is correct ;)
Step-by-step explanation:
i just did it haha
The option B is the correct answer i.e. the function g(x) can be defined as g(x) = ((1/2)x)².
What is a function?A function is defined as a relationship between a set of inputs that each have one output.
How to solve this problem?Notice that the function g(x) passes through the point (2,1). So, the functional value of g(x) at x = 2, i.e. g(2) = 1.
Check which option match this criterion.
Now, for option A,
g(x) = (1/2)x²
and g(2) = (1/2)×2² = (1/2)×4 = 4/2 = 2 ≠ 1
So, option A is incorrect.
For option B,
g(x) = ((1/2)x)²
and g(2) = ((1/2)×2)² = (2/2)² = 1² = 1
So, option B is correct.
Therefore option B is the correct answer i.e. the function g(x) can be defined as g(x) = ((1/2)x)².
Learn more about functions here -
https://brainly.com/question/20317632
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MAX POINTS. Brainliest for best answer and please dont give me some dumb answer. Please explain as well.
-6x-32/5=14 because the 32 has nothing to do with the problem the correct answer is -35/4, -30/5
sid and micah solve the equation below:
[tex]\frac{1}{2} (6x-10) = 2x+1[/tex]
sid's first step results in [tex]3x-5= 2x+1[/tex]
micah's first step results in [tex]6x-10 =4x+1[/tex]
a) Micah is correct
b) sid is correct
c) neither of them are correct
d) they are both correct
A blueprint for a building includes a rectangular room that measures 3 inches wide and 5.5 inches long. The scale for the blueprint says that 1 inch on the blueprint is equivalent to 10 feet in the actual buildingBelow give the dimensions of this rectangular room in the actual building.
What is the width of the building?
16.5 feet
30 feet
55 feet
What is the length of the building?
16.5 feet
30 feet
55 feet
Answer:
width of the building = 30 feet
Length of the building = 55 feet
Step-by-step explanation:
On blue print:
Width = 3 inches, length = 5.5 inches
scale factor = 10 inches
Therefore, actual dimensions of the building would be as given below:
width of the building = 3 * 10 = 30 feet
Length of the building = 5.5 * 10 = 55 feet
Factor 4x^2-52x+160 completely
(would be great if all work was shown, please) ☺☺
Answer:
4(x - 5)(x - 8)
Step-by-step explanation:
Given
4x² - 52x + 160 ← factor out 4 from each term
= 4(x² - 13x + 40) ← factor the quadratic
Consider the factors of the constant term (+ 40) which sum to give the coefficient of the x- term (- 13)
The factors are - 5 and - 8, since
- 5 × - 8 = + 40 and - 5 - 8 = - 13, thus
x² - 13x + 40 = (x - 5)(x - 8)
Then
4x² - 52x + 160 = 4(x - 5)(x - 8)
You have a total of 32 coins, dimes and nickels, that are worth $2.55. How many of each do you have?
Hi!
I'm happy to help you today!
You would have 25 Dimes and 1 nickel!
This is because
1 Dime = 10 Cent's
1 Nickel = 5 Cent's
So if you add them up like so, you get the amount of $ 2.55!
-LimitedLegxnd
-If you are happy with my answer make sure to hit that heart! Also to show others how helpful my answer is rate my by clicking the stars!
PLEASE HELP SOON I ONLY NEED HELP WITH NUMBER 18 PICTURE IS INCLUDED
Critical thinking? We're in trouble. It's hard for me to tell what grade this is.
Stem and leaf is fine but let's just write out the data.
Rich: 35 37 41 42 43 44 45 48 50 55 n=10
Will: 42 43 44 44 46 47 47 48 49 50 n=10
Use measures of center and measures of variation ...
The three measures of center typically used are the mean, the median and the mode.
Rich's sum = 440 so Rich's mean = 440/10 = 44
Rich's middle values are 43 and 44 so Rich's median = 43.5
All Rich's scores are unique so he doesn't really have a mode.
Will's sum = 460, Will's mean = 460/10 = 46
Will's middle numbers are 46 and 47 so median 46.5
Will's data has two modes tied, 44 and 47.
OK, so far these say Rich is a better golfer; he has lower mean and median scores than Will. (Low score is better in golf.)
Let's look at measures of variation. I'm guessing that they don't want to you calculate standard deviation. So we'll do range and mean absolute deviation.
The range is max-min.
Rich's range is 55-35=20
Will's range is 50-42=8
Will is more consistent.
Rich's mean is 44, his scores are here; let's calculate absolute deviation:
Score 35 37 41 42 43 44 45 48 50 55
AbsDev 9 7 3 2 1 0 1 4 6 11
Rich's deviations add to 44 so his MAD is 4.4
Will's mean is 46
Score: 42 43 44 44 46 47 47 48 49 50
AbsDev 4 3 2 2 0 1 1 2 3 4
The sum is 22, Will's MAD is 2.2
Based on the measures of variation, Will is a more consistent golfer. He's on average worse than Rich, but he always manages to stay pretty close to his average while Rich is all over the place.
Still I'd go with Rich for the tournament.
The graph shows the numbers of quarts of yellow paint that must be mixed with different numbers of quarts of red paint to make a certain shade of orange paint.
Based on the graph, write an equation that shows the relationship between the number of quarts of yellow paint, y, and the number of quarts of red paint, x, needed to make the shade of orange paint.
Enter your equation in the space provided. Enter only your equation.
Answer:
[tex]y =\frac{2}{5}x[/tex]
Step-by-step explanation:
To find the equation, we need to use two points, which can be (0,0) and (5,2).
First, we find the slope
[tex]m=\frac{y_{2} -y_{1} }{x_{2} -x_{1} } =\frac{2-0}{5-0}=\frac{2}{5}[/tex]
Therefore, the slope for the equation is 2/5.
Now, we use the point-slope formula to find the equation
[tex]y-y_{1} =m(x-x_{1} )\\y-0=\frac{2}{5}(x-0)\\y =\frac{2}{5}x[/tex]
Therefore, the equation that represents this situation is [tex]y =\frac{2}{5}x[/tex]
the equation x^3 - 6x = 72 has a solution between 4 and 5.
Use a trial and improvement method to find the solution correct to one decimal place,
Answer:
4.6
Step-by-step explanation:
There are a number of "improvement" techniques that can be used to improve an estimate of a solution to a polynomial. Some of them use the polynomial itself to form the iterator function.
IteratorThere are a number of ways we can solve the given equation for x. Often, at least one of these will converge when used for improving the estimated value of x.
x₁ = (x^3 -72)/6 . . . . . . . add 6x-72, divide by 6
x₂ = 72/(x^2 -6) . . . . . . . factor out x and divide by its coefficient
x₃ = ∛(72 +6x) . . . . . . . add 6x and take the cube root
The first two of these iterators tend to diverge. For x = 4.5, they give ...
x₁ = (4.5³ -72)/6 = 3.1875
x₂ = 72/(4.5² -6) = 5.0526
Both of these stray out of the given interval of [4, 5].
However, the third one tends to converge, so can give us a useful approximation in one iteration:
x₃ = ∛(72 +6×4.5) ≈ ∛99 ≈ 4.6261
Second iterationApplying this again, we get ...
x ≈ ∛(72 +6·4.6261) ≈ 4.6378
The approximate root to 1 decimal place is 4.6.
__
Additional comment
One of the quickest converging iterators is that provided by Newton's method. For finding the solution to f(x) = 0, it uses ...
x₁ = x -f(x)/f'(x) . . . . . . . where f'(x) is the first derivative
For this problem, we can define ...
f(x) = x^3 -6x -72 ⇒ f'(x) = 3x^2 -6
x₁ = x -(x^3 -6x -72)/(3x^2 -6) = (3x^3 -6x -x^3 +6x +72)/(3x^2 -6)
x₁ = (2x^3 +72)/(3x^2 -6)
Then for x = 4.5, the "improved" solution is ...
x₁ = (2(4.5³) +72)/(3(4.5²) -6)) = 254.25/54.75 = 339/73 ≈ 4.6438
A second iteration gives ...
x ≈ 4.639026 . . . . accurate to 5 decimal places
With this iterator, the number of accurate decimal places tends to double with each iteration.
A math teacher gave her students two tests. On the first test, 80% of the class passed the test, but only 30% of the class passed both tests.
What is the probability that a student passes the second test, given that they passed the first one?
55% because you add 80% and 30% which is 110% and divide that by 2.
A slice of pizza has an area of 13.5 sq inches. If the pizza has a radius of 9 inches, how many pizza slices make up the whole pie?
Which is the graph of f(x) = StartRoot x EndRoot?
Answer:
B
Step-by-step explanation:
On a coordinate plane, an exponential function increases in
quadrant 3 into quadrant 4 and approaches y = 0. It goes through
(negative 1, negative 2) and crosses the y-axis at (0, negative 0.25) ⇒ last answer
HOPE IT HELPS ....
Find the slope of the line that passes through the points (-1, -2) and (-9, -2)
Slope = change in Y / change in x
Slope = (-2 - -2) / (-9 - -1)
Simplify:
Slope = 0/-8 = 0
Slope = 0
a snowball has a radius of 7 centimeter . what is the volume
The formula for the volume of a sphere is given by
V = (4/3)πr3
Since the radius is 7 cm, let's substitute that in:
V = (4/3)(3.14)(7 cm)3
V = 1436.755 cm3 = 1437 cm3, rounding to the nearest whole unit as requested.
Answer: The volume is about 1436.01
Step-by-step explanation:
so since a snowball is like a sphere we would use the sphere formula to calculate the volume of the snowball.
Formula of a sphere ; 4/3*π * r^3
v= 4/3 * 3.14 * 343
v= 1435.01
The cylinder and the sphere below have the same radius and the same volume. What is the height of the cylinder?
Answer:
Height of cylinder (h) = (4/3)R
Step-by-step explanation:
Given:
Radius of cylinder (r1) = R
Height of cylinder (h) = H
Radius of sphere (r2) = R
Volume of cylinder = volume of sphere
Find:
Height of cylinder (h) = H = ?
Computation:
[tex]Volume\ of\ cylinder = volume\ of\ sphere\\\\ \pi (r1)^2h =\frac{4}{3} \pi (r2)^3\\\\\pi (R)^2h =\frac{4}{3} \pi (R)^3\\\\ h=\frac{4}{3} (R)[/tex]
Height of cylinder (h) = (4/3)R
I = $18, P = $200, 1
18 months find the annuanl interest rate
Answer: 6% per year
Step-by-step explanation:
SI = PRT / 100
18 = (200 x r x 1.5)/ 100
(11*10^11)(12*10^12)
Answer:
3,200,000,000,000,000,000,000,000
Step-by-step explanation:
(11 × [tex]10^{11}[/tex])(12×[tex]10^{12}[/tex])
(11 × 100,000,000,000)(12×1,000,000,000,000)
(1,100,000,000,000)(12,000,000,000,000)
3,200,000,000,000,000,000,000,000
Answer:
3,200,000,000,000,000,000,000,000
Step-by-step explanation:
(11 × )(12×)
(11 × 100,000,000,000)(12×1,000,000,000,000)
(1,100,000,000,000)(12,000,000,000,000)
3,200,000,000,000,000,000,000,000
Which equation represent inverse variation between x and y
The equation representing the inverse relation is given by -
x = 15k/y.
What is the general equation of a Straight line?
The general equation of a straight line is -
[y] = [m]x + [c]
where -
[m] → is slope of line which tells the unit rate of change of [y] with respect to [x].
[c] → is the y - intercept i.e. the point where the graph cuts the [y] axis.
We have a equation that represent inverse variation between x and y.
The equation for inverse relation comes from the equation of straight line. We can write -
x = m/y
xy = m
for m = 15k -
xy = 15k
x = 15k/y
Therefore, the equation representing the inverse relation is given by -
x = 15k/y.
To solve more questions on straight lines, visit the link below-
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Jack recently planted a beanstalk and decided to measure its height each day. Jack plotted the following points on a graph, where the x-axis represented the day and the y-axis represented the height of his new beanstalk: (0,0); (1,2); (2,4); (3,6); (4,8); (5,10).
Which of the following correctly interprets the average rate of change?
A. Jack's beanstalk grew 2 units every day.
B. Jack's beanstalk grew 2 units every three days.
C. Jack's beanstalk grew 1 unit every day.
D. Jack's beanstalk grew 1 unit every two days.
Answer: A
Step-by-step explanation:
Jacks beanstalk grew 2 units everyday
Answer: a.
Step-by-step explanation:
Each units grows by two units every day.
Question 1: Milton is 95 miles from Leek. Doncastle is 102 miles from Leek. Which town is the greater distance from Leek? Question 2: Hannah took 817 seconds to complete a puzzle. Olly took 798 seconds to complete the same puzzle. Who completed the puzzle in the shortest time? Question 3: Arrange these temperatures in order, from lowest to highest 18°C, 22°C, 9.5°C, 15°C, 21°C, 17°C, 2°C Question 4: Write down the value of the 7 in the answer to 573 x 100 Question 5: Using the three digits 1, 2 and 3, write down all the different three digit numbers. Question 6: Write down a number that is larger than 3.4 but smaller than 3.5 e CORBETTMATHS 2017
Answer:
1. Doncastle
2. Olly
3.
4. thousand
5. 123
231
321
213
132
213
6. 3.45
Step-by-step explanation:
I hope my answer was the brainliest
Answer:
1) Doncastle
2) Olly
3) 2, 9.5, 15, 17, 18, 21, 22
4) 7000
5) 123, 132, 231, 321, 213, 312
6) 3.45
Which of the following has the larger area?
Answer:
the rectangle by 170 square inches, let me know if im right :)
Step-by-step explanation:
ASAP
(if) You earn 3k a day. And has been dreaming of buying a fishing shack (a small one with three floors) for 50k / 30 days. How much would you have by that 30 days if you earn 3k a day.
Answer:$90,000
Step-by-step explanation:
3,000*30=90,000
Answer: 90k
Step-by-step explanation:
3k per day x 30 days
WILL GIVE BRANILIEST ANSWER!! 100 POINTS!! How important are the "special features" of a polynomial graph? When would you need to find all of the precise values of special features of the graph of a polynomial function? When would it be okay to estimate these values? Give examples in context, if possible.
Answer:
The special features of a polynomial graph are sharp corners but in these types of graphs it also has smooth curves. Polynomial graphs functions also display graphs that have no breaks.Curves with no breaks are called continuous.
Step-by-step explanation:
What is the approximate volume of the tube? Round to the
nearest whole cubic centimeter.
A cylindrical cardboard tube with a diameter of 8
centimeters and a height of 20 centimeters is used to
package a gift
20 cm
1,005 cm
1,340 cm
O 3,351 cm
O 4,021 cm
• 8 cm
Mark this and retum
Next
Submit
Answer:
The approximate volume of the tube is 1,005 cm³
Step-by-step explanation:
To find the volume of the tube, we will follow the steps below:
First, write the formula for calculating the volume of a cylinder
volume of a cylinder = πr²h
where r is the radius and h is the height of the cylindrical cardboard tube
from the question given, height is equal to 20 centimeters and diameter = 8 centimeters but diameter = 2r, this implies that r = d/2 hence radius r =8/2 = 4 centimeters
π is a constant and is ≈ 3.14
we can now proceed to insert the values into the formula
volume of a cylinder = πr²h
≈ 3.14 × 4²× 20
=3.14 × 16× 20
≈1,005 cm³ to the nearest whole cubic centimeter.
The approximate volume of the tube is 1,005 cm³
Answer:
A
Step-by-step explanation:
edge 2021