how to make students understand 3. students may have a hard time understanding that a whole number can be portioned into parts

Answer:

Step-by-step explanation:

To solve the equation, we can simplify the expression on the right side of the equation first:

9(7+9) = 9(16) = 144

Then, we can rewrite the equation as:

x + 81 = 144

To solve for x, we can subtract 81 from both sides:

x + 81 - 81 = 144 - 81

x = 63

Therefore, the completed equation is:

63 + 81 = 9(7+9)

Answer:

63

Step-by-step explanation:

First solve the right side of the equation by expanding the parenthesis using the BODMAS and Distributive Law:

9(7 + 9) = 9(16)

             = 144

Now equate the above answer to the left side of the equation:

—- + 81 = 144
—- = 144 - 81

   = 63

Answer:

So, about 2.28% of men in the country are no more than 64 inches tall.

Step-by-step explanation:

First, we need to standardize the value of 64 inches to a z-score:

z = (64 - 68) / 2 = -2

We can use a standard normal distribution table or a calculator to find the percentage of men who are no more than 64 inches tall:

P(Z ≤ -2) = 0.0228

The rate of change of the function y=3x+3 is 3

From the question, we have the following parameters that can be used in our computation:

y = 3x + 3

The above function is a linear function

A linear function is represented as

y = mx + c

Where

m = slope = rate of change

Using the above as a guide, we have the following:

rate of change = 3

Hence, the rate of change is 3

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The volume of the concrete required to be poured for a rectangular prism floor slab are;

11. 5 1/3 cubic yards

12. 74 2/27 cubic yards

A rectangular prism is a polyhedron that consists of six rectangular faces, in which the adjacent faces are perpendicular and opposite faces are parallel.

11. The dimensions of the floor slab = 18' × 24' × 4''

Where the shape of the slab is a rectangular prism, we get;

Width of the floor slab = 24 feet

Length of the floor slab = 18 feet

Height of the floor slab = 4 inches

4 inches = (1/3) ft

The volume of the cement is therefore;

V = 24 ft × 18 ft × (1/3) ft = 144 ft³

The volume of the concrete required to pour a floor slab of the dimensions: 18' × 24' × 4'' is 144 cubic feet

1 yard = 3 feet

The dimensions of the slab are therefore;

Length = 24/3 yards = 8 yards

Width = 18/3 yards = 6 yards

Height = (1/3)/3 yards = (1/9) yards

The volume of the slab = 8 yards × 6 yards× 1/9 yard = 16/3 cubic yards

12. The dimensions of the slab are;

Length of the slab = 80 feet = 80/3 yards

Width of the slab = 60 feet = 60/3 yards = 20 yards

Height of the slab = 5 inches = 5/12 ft = 5/(12 × 3) yard = 5/36 yard

The volume of the concrete slab is therefore;

(80/3) yards × 20 yards × (5/36) yard = 74 2/27 cubic yards

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Answer:

∠ Y = 60° , WY = 7 in

Step-by-step explanation:

the sides WX and YX are congruent then the triangle is isosceles with base angles congruent, that is

∠ Y = ∠ W = (180 - 60)° ÷ 2 = 120° ÷ 2 = 60°

Since all 3 angles in the triangle are congruent , all 60° then the triangle is equilateral with 3 congruent sides, then

WY = 7 in

Least number of uniform = 45

Rounding a number means the process of making a number simpler such that its value remains close to what it was. The result obtained after rounding off a number is less accurate, but easier to use. While rounding a number, we consider the place value of digits in a number.

Given,

Curtis wears a uniform number that rounds to 50 to the nearest ten and 0 to the nearest hundred.

Whole numbers, that can be rounded to 50 to the nearest ten are

45, 46, 47, 48, 49, 50, 51, 52, 53, 54

Smallest number is 45

Hence, 45 is the least uniform number Curtis can have.

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Answer: The value of sin(2x) can be found using the identity:

sin(2x) = 2sin(x)cos(x)

Since tan(x) = -1/5, we can use the tangent definition to find the sine and cosine values:

tan(x) = sin(x) / cos(x) = -1/5

Cross multiplying and solving for sin(x), we get:

sin(x) = -5 / sqrt(26)

And using the Pythagorean identity:

cos^2(x) + sin^2(x) = 1

We can find cos(x):

cos(x) = sqrt(1 - sin^2(x)) = sqrt(1 - (-5/sqrt(26))^2) = sqrt(26) / sqrt(26) = sqrt(26) / sqrt(26) = sqrt(26) / 5

Finally, substituting the values of sin(x) and cos(x) into the formula for sin(2x), we get:

sin(2x) = 2sin(x)cos(x) = 2 * (-5 / sqrt(26)) * (sqrt(26) / 5) = -2 sqrt(26) / 5 = -2 sqrt(26) / 5 = -2 sqrt(26) / 5

So the exact value of sin(2x) is -2 sqrt(26) / 5.

Step-by-step explanation:

Answer:

p = 1,400

Step-by-step explanation:

In the simple interest rate formula, each year the same amount of interest is applied, as it's based off the initial amount invested and the interest rate.

[tex]I=P*r*t[/tex]

Where "r" is the interest rate, "t" is time, and "p" is the principle amount, or initial amount invested.

We're given the following values:

Now the only thing is generally speaking, interest is applied annually rather than monthly. So we would need to convert the 3 months into years, which we can do by dividing by 12, giving us: 0.25 years

So we actually have: t = 0.25 years

Now from here we can plug in known values, and leave anything we don't know alone. So we start with our initial formula of:

[tex]I=P*r*t[/tex]

Now from here we plug in i = 21, t = 0.25, r = 0.06 and leave "P" as "P"

[tex]21=P*0.25*0.06[/tex]

Now let's simplify the multiplication on the right side:

[tex]21 = 0.015P[/tex]

Divide both sides by 0.015:

[tex]1,400=P[/tex]

And now we have our missing value!

a)  v(t) = -32t + 80 feet/second  and a(t)= -32 feet/second²

b. t = 3 seconds.

c. 24 feet/second > 0).

d.  the time at which the rock reaches its highest height is 2.5 seconds and 80 feet respectively.

e. the acceleration is given by a(2.5) = -32 feet/second²

The velocity, v(t), of the rock is given by the derivative of the position function s(t) with respect to time,

v(t) = ds(t)/dt = -32t + 80 feet/second.

The acceleration, a(t) = dv(t)/dt = -32 feet/second²

b) v(3) = -32*3 + 80 = 24 feet/second.

This quantity represents the velocity of the rock at t = 3 seconds.

c) At t = 3 seconds, the rock is rising up because the velocity is positive (v(3) = 24 feet/second > 0).

d) the time at which the rock reaches its highest height,

v(t) = 0, we get -32t + 80 = 0, so t = 80/32 = 2.5 seconds.

The height of the rock will be found using the position function s(t), so s(2.5) = -16(2.5)^2 + 80(2.5) = 80 feet.

e) At the highest height, the velocity of the rock is 0, so the acceleration is given by a(2.5) = -32 feet/second².

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The question is:

How many Syrian citizens choose to leave the country every year for better opportunities?

A survey that is collected through the facts and numbers from the data is a quantitative survey.

We have to write a quantitative survey or simulation question(s)?

For that,

we will form the variable and target group.

The question:

How many Syrian citizens choose to leave the country every year for better opportunities?

Variable: Number of citizens looking for better opportunities

Target Group: Syrian citizens.

Hence, the question is given above.

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The bar diagram could describe the following real-world problem:

"Peter has an amount of $12 in a piggy bank. If he spends two-thirds of his piggy bank, what does he have now?"

Algebraic expressions are mathematical statements with a minimum of two terms containing variables or numbers.

We have to give that;

A bar diagram is shown in the figure.

Now, We can make a real-world problem that could represent the bar diagram.

So, We get;

"Peter has an amount of $12 in a piggy bank. If he spends two-thirds of his piggy bank, what does he have now?"

Hence, the above question represents the bar diagram shown.

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The question seems incomplete, the missing graph has been attached below.

The probability that a cat, jumping on 7 keys in sequence and at random (possibly with repetition), will strike the first seven notes of Beethoven's Fifth Symphony is; P = 2.45 * 10⁻¹⁴

The parameters expressed are;

Number of Piano Keyboard keys = 88

The following steps can be used in order to determine the probability that a cat, jumping on 7 keys in sequence and at random, will strike the first four notes of Beethoven's Fifth Symphony:

Step 1 - The four notes of the piano are 3 LA's and 1 REb.

Step 2 - The probability that the first key is LA is 1/88.

Step 3 - The probability that the second key is LA is 1/88.

Step 4 - The probability that the third key is LA is 1/88.

Step 5 - The probability that the key is REb is 1/88.

Step 6 - So, the probability that a cat, jumping on 4 keys in sequence and at random, will strike the first four notes of Beethoven's Fifth Symphony is:

P = 1/88 * 1/88 * 1/88 * 1/88 * 1/88 * 1/88 * 1/88

P = 2.45 * 10⁻¹⁴

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Answer:

1,500 beds

Step-by-step explanation:

Occupancy rate  shelter A = 300 x 20/100 = 60

Let capacity of shelter B be X

60% occupancy ==> 60/100 x X = 0.6X

Occupancy rate of A to rate of B is 1: 15 can be expressed as fraction 1/15

Therefore
60/0.6X = 1/15

1 x 0.6X = 60 x 15

0.6X = 900

X = 900/0.6 = 1,500 beds

A car is through internet is better to buy.

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

In the fall of 2014,

1 U.S. dollar =  1.10 Canadian dollars.

Here, An automobile in Toronto sells for 26,000 Canadian dollars.

And, The same car on sale for 23,000 U.S. dollars on the internet.

Thus, The cost of car on internet is,

⇒ 23,000 U.S. dollars

⇒ 23,000 × 1.10 Canadian dollars.

⇒ 25,300 Canadian dollars.

Thus, A car is buy through internet is better to buy.

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Answer:

no real factors

Step-by-step explanation:

-2x² - 11x - 20

try use the first 3 answers as factor, you'll see non works.

Answer:

Yards:2497.66667-Rounded up to 2498 yds. Miles: 1.41912879- or 1.4-miles Feet literally 7493 as its feet

Step-by-step explanation:

convert 7493 ft to miles, yards and feet​?

Alright, first, let's get rid of feet. 7,493 ft is feet, so all we need is to find miles and yards.

To convert feet to miles, divide feet by 5,280. So 7,493/5,280, which is 1.41912878788 miles.

To convert feet to yards, divide feet by 3. So 7,493/3, which is 2497.66666667 yards.

Hope this helped!

more information needed. no graphs to choose.

no multiple choice given..

There is not enough information to determine the rates of change which is therefore denoted as option C in the table and graph given.

This is referred to as a pictorial representation or a diagram that represents data or values in an organized manner.

In the graph and table there was no clear representation of the variables in the x and y coordinates which is therefore the reason why there won't be enough information to determine the rate of change which is therefore the correct choice.

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The full question:

Compare the rates of change of the following table and graph. x y 1 -4 2 -8 3 -12 4 -16 A. The rate of change of the table is greater than the rate of change of the graph. B. There is not enough information to determine the rates of change. C. The rate of change of the table is equal to the rate of change of the graph. D. The rate of change of the graph is greater than the rate of change of the table.

Answer:489

Step-by-step explanation:just divide 42,543 by 87

Answer489 I hope this helps

Step-by-step explanation:

The answer is 489 use a calculator

Answer:

If the angle between two unit vectors u and v is 3.14/3, then using the law of cosines, ||u + v||^2 = 2 + 2cos(3.14/3) = 2 + 2(0.5) = 3. Hence ||u + v|| = sqrt(3).

To find the value of k such that the system has a unique solution, no solution, or an infinite number of solutions, we can use the determinant of the coefficient matrix. If the determinant is nonzero, then the system has a unique solution. If the determinant is zero and the system of equations is inconsistent, then the system has no solution. If the determinant is zero and the system of equations is consistent, then the system has an infinite number of solutions. In this case, the determinant of the coefficient matrix is zero, which implies that the system has an infinite number of solutions.

The eigen values and eigen vectors of the matrix can be found by solving the characteristic equation, which is obtained by det(A - λI) = 0, where A is the matrix and I is the identity matrix.

For the matrix

2 1 -1

3 2 -3

3 1 -2

the characteristic equation is

(2 - λ)(3 - λ) - 3 = 0

which gives us λ = 1 and λ = 3 as the eigen values.

The corresponding eigen vectors can be found by solving the system of equations (A - λI)x = 0, where x is the eigen vector.

For λ = 1, the eigen vector is (1, -1, 1).

For λ = 3, the eigen vector is (-1, 2, 1).

If f(x) is a polynomial of degree 4 with roots 1, 2, 3, 4 and leading coefficient 1, and g(x) is a polynomial of degree 4 with roots 1, 1/2, 1/3, 1/4 and leading coefficient 1, then the limit of 1/f(x)/g(x) as x approaches infinity does not exist. This can be seen by noting that f(x) and g(x) both grow without bound as x grows without bound, so the ratio of the two polynomials also grows without bound.

Answer:

5x linear monomial



-7 constant monomial

x^2+4 quadratic binomial

x^2-3x+11 quadratic trinomial

2x-9 linear binomial

Step-by-step explanation:

Linear indicates a line, the power of x in the equation is 1 (which we never write the power one, so it looks like just x)



Quadratics have an x to the power of 2

A constant is a plain number with no variable.

The prefixes mono-, bi-, and tri- can help you with these. Mono- means one. Monomials have one term, such as 5x or -7

Bi- means two. Binomials have two terms such as x^2+4 or 2x-9.

Tri- means three. Trinomials have three terms such as x^2-3x+11.

The value of  80% of 150 is 120

From the question, we have the following parameters that can be used in our computation:

80% of 150

The table of value is not given

However, the expression can be evaluated without the table

Using the above as a guide, we have the following:

80% of 150 =  80% * 150

Evaluate the product

80% of 150 = 120

Hence, the value is 120

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Answer: The outlier of the data is 65! Hope this helps you!

For the given condition the correct inequality is,

⇒ x ≥ 20

Where, x represent the number of questions.

A relation by which we can compare two or more mathematical expression is called an inequality.

Given that;

A student decides to solve at least 20 math problems every day to better their grade if they self and math problems every day.

Let number of questions done by a student = x

So, The inequality for the given condition is,

⇒ x ≥ 20

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Answer:

Step-by-step explanation:

I took your points looooser hahahaha

Answer:

[tex] \frac{1}{16} [/tex]

ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ

Answer:

16 is correct

Step-by-step explanation:

Your welcome

The volume of the rectangular prism is 400 cubic centimeters which we can calculate using formula: Volume = L * W * H

The volume of rectangular prism can be computed by simply multiplying their dimensions. If the rectangular prism was built with cubes that each have a volume of one cubic centimeter, then the volume of the rectangular prism can be calculated by multiplying the number of cubes in each dimension.

Let's assume that the rectangular prism has a length of "L" cubes, a width of "W" cubes, and a height of "H" cubes. Then, the volume of the rectangular prism can be calculated as follows:

Volume = L * W * H

Each cube has a volume of one cubic centimeter, so the volume of the rectangular prism is equal to the number of cubes it contains. In other words, if the rectangular prism has 10 cubes along its length, 5 cubes along its width, and 8 cubes along its height, then its volume would be:

Volume = 10 * 5 * 8 = 400 cubic centimeters

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This function is not one-to-one because different ages can have the same height.

This function f(t) is not one-to-one because different ages can have the same height. For example, two people at age 20 could have the same height, even though one is 20 years old and the other is not. Additionally, two people of different ages can have the same height, such as a 5 year old and a 25 year old with the same height. One-to-one functions require that for every input there is only one output, which is not the case for this function. This is because height is not necessarily determined solely by age, and can be influenced by genetics and other environmental factors. Therefore, for any given age, there could be multiple possible heights, and this function does not satisfy the definition of a one-to-one function.

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a. probability of neither a math major nor an engineering major is: 0.1783

b. probability is only an engineering major: 0.5167

The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. The probability of an occurrence is a number between 0 and 1, where 0 denotes the event's impossibility and 1 represents certainty.

Given that,

n(S) = 60

n(math) = n(M) = 183 ⇒ P(M) = n(M)/ n(S) = 183/600

n(engineering) = n(E) = 366 ⇒ P(E) = n(E)/ n(S) = 366/600

n(M∩E) = 56

P (M∩E) = n(M∩E) / n(S) = 56/600

a) probability of neither a math major nor an engineering major is:

P (M' ∩ E') = P (M∪E)'

P (M' ∩ E') = 1 - P (M∪E)

P (M' ∩ E') = 1 - [P(M) + P(E) - P(M∩E)]

P (M' ∩ E') = 1 - [183/600 + 366/600 - 56/600]

P (M' ∩ E') = 0.1783

b)

probability is only an engineering major:

P(E - M) = P(E) - P(M∩E)

P(E - M) = 366/600 - 56/600

P(E - M) = 0.5167

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