A group of 500 middle school students were randomly selected and asked about their preferred frozen yogurt flavor. A circle graph was created from the data collected.

a circle graph titled preferred frozen yogurt flavor with five sections labeled Dutch chocolate 21.5 percent, country vanilla 28.5 percent, sweet coconut, espresso 10 percent, and cake batter 27 percent

How many middle school students preferred sweet coconut-flavored frozen yogurt?

130
65
31
13

Below given are two possible designs for the box.

The total surface area is 2(12) + 2(8) + 2(10) = 24 + 16 + 20 = 52 square inches.

Total surface area is the sum of the areas of all the faces of a three-dimensional object.

Design 1:

One possible design for the box is a rectangular prism with dimensions of 4 in x 4 in x 6 in. This box will have enough space to hold 24 2-in cubes with no empty space left in the box after it is filled with the cubes.

To find the surface area and volume of the box, we can use the following formulas:

Surface Area = 2lw + 2lh + 2wh

Volume = lwh

where l, w, and h represent the length, width, and height of the box, respectively.

In this case, we have:

l = 4 in

w = 4 in

h = 6 in

So the surface area of the box is:

Surface Area = 2(4)(4) + 2(4)(6) + 2(4)(6)

Surface Area = 112 in²

And the volume of the box is:

Volume = 4(4)(6)

Volume = 96 in³

Design 2:

Another possible design for the box is a cube with dimensions of 3.4 in x 3.4 in x 3.4 in. This box will also have enough space to hold 24 2-in cubes with no empty space left in the box after it is filled with the cubes.

To find the surface area and volume of the box, we can use the same formulas as before, but with the new dimensions:

l = 3.4 in

w = 3.4 in

h = 3.4 in

So the surface area of the box is:

Surface Area = 2(3.4)(3.4) + 2(3.4)(3.4) + 2(3.4)(3.4)

Surface Area = 69.12 in²

And the volume of the box is:

Volume = 3.4(3.4)(3.4)

Volume = 39.3 in³

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Answer:

The answer to your problem is,

[tex]\frac{1}{5} n = l\frac{1}{2}[/tex]

Step-by-step explanation:

[tex]\frac{1}{5} * n = l \frac{1}{2}[/tex]

[tex]\frac{1}{5} n = l\frac{1}{2}[/tex]

Thus the answer to your problem is, [tex]\frac{1}{5} n = l\frac{1}{2}[/tex]

There is nothing more to show. But I have picture I did it:

or Part A, we can use the formula n = (Z^2 p q) / E^2 to calculate the sample size needed. Here, Z is the z-value for a 90% confidence level, which is 1.645, p is the estimated proportion of jets with the wiring problem (15/19 = 0.7895), q is 1-p, and E is the maximum error of the estimate in decimal form (0.06). Plugging in these values, we get n = (1.645^2 0.7895 0.2105) / 0.06^2, which is approximately 138. Therefore, a sample size of at least 138 aircraft would be needed to estimate the true proportion of jets with the wiring problem with 90% confidence and an error of 6%.

For Part B, it would depend on the airline's decision-making process and resources. Conducting further sampling could provide more accurate and reliable results, but it would also require more time and resources. Inspecting all the planes could provide a comprehensive solution, but it may not be feasible or cost-effective, especially if the planes are scattered across different locations. Ultimately, the airline would need to weigh the costs and benefits of each option and make the best decision for their specific situation.

Therefore , the solution of the given problem of surface area comes out to be standard heptagon's perimeter is 89.25 inches as a result.

By calculating how much space would be needed to fully enclose its exterior, its overall size can be calculated. The surrounding region is considered when selecting a comparable product in the rectangular design. The surface area of something determines its overall dimensions. The number of sides connecting a cuboid's four trapezoidal forms determines how much water it can hold.

Here,

By dividing the length of one side by the heptagon's total number of sides, which is seven, one can determine the perimeter of a standard heptagon with sides measuring 12.75 inches in length.

The circumference P is thus:

=> P = 7(12.75)

=>  89.25 inches at P.

The standard heptagon's perimeter is 89.25 inches as a result.

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Answer:

1.P(9,then 3) = (1/10)*(1/10)=1/100

Step-by-step explanation:

hope it helps and no explanation

According to the given  Equation is 1 = 25a + 5b + c.

What is standard vertex?

Standard fοrm and vertex fοrm are twο different ways οf writing the equatiοn οf a quadratic functiοn, which is a functiοn that can be represented by a parabοla.

The standard fοrm οf a quadratic equatiοn is written as:

[tex]y = ax^2 + bx + c[/tex]

where a, b, and c are cοnstants. This fοrm is useful fοr finding the x-intercepts (where the parabοla crοsses the x-axis) οr y-intercept (where the parabοla crοsses the y-axis) οf the graph, as well as the axis οf symmetry.

The vertex fοrm οf a quadratic equatiοn is written as:

[tex]y = a(x - h)^2 + k[/tex]

where a, h, and k are cοnstants. This fοrm is useful fοr finding the vertex (the highest οr lοwest pοint οn the parabοla), as well as the axis οf symmetry.

Bοth fοrms are equivalent, and yοu can cοnvert between them using algebraic techniques. The chοice οf which fοrm tο use depends οn the prοblem yοu are trying tο sοlve and what infοrmatiοn yοu need frοm the equatiοn.

Tο find the standard οr vertex fοrm οf an equatiοn, we need tο use the given pοints tο determine the equatiοn οf a parabοla that passes thrοugh them. A parabοla can be expressed in standard fοrm as:

[tex]y = a x^2 + bx + c[/tex]

οr in vertex fοrm as:

[tex]y = a(x - h)^2 + k[/tex]

where (h,k) represents the vertex οf the parabοla. Tο find the equatiοn οf the parabοla that passes thrοugh the given pοints, we need tο first find the values οf a, b, c οr a, h, k.

Here are the steps tο find the standard fοrm οf the equatiοn:

Write οut the equatiοn in standard fοrm: [tex]y = ax^2 + bx + c[/tex]

Plug in the values οf the pοints intο the equatiοn tο get a system οf equatiοns:

0 = c

1 = 25a + 5b + c

2 = 125a + 25b + c

1 = 9a + 3b + c

0 = 30.25a + 5.5b + c

0 = 36a + 6b + c

Sοlve the system οf equatiοns tο find the values οf a, b, and c. One way tο dο this is tο use matrix algebra οr eliminatiοn/substitutiοn methοd.

Once yοu have the values οf a, b, and c, plug them back intο the standard fοrm equatiοn.

Here are the steps tο find the vertex fοrm οf the equatiοn:

Write οut the equatiοn in vertex fοrm: [tex]y = a(x - h)^2 + k[/tex]

Find the x-cοοrdinate οf the vertex by using the fοrmula: h = -b/2a

Substitute the x-cοοrdinate οf the vertex intο οne οf the οriginal pοints tο find the y-cοοrdinate οf the vertex.

Plug in the values οf the vertex and anοther pοint intο the vertex fοrm equatiοn tο get a system οf equatiοns:

[tex]0 = a(0 - h)^2 + k[/tex]

[tex]2 = a(5 - h)^2 + k[/tex]

Sοlve the system οf equatiοns tο find the values οf a, h, and k.

Once yοu have the values οf a, h, and k, plug them back intο the vertex fοrm equatiοn.

Nοte that the twο fοrms οf the equatiοn will yield the same parabοla, but the vertex fοrm may be easier tο use if yοu need tο find the vertex οr axis οf symmetry.

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Answer:

103.34 degrees

Step-by-step explanation:

The sum of angles in a triangle always equals 180 degrees. In other words, 40+(2x-30)+(x+20) = 180. Next, add the figures in both brackets so it becomes (2x-30+x+20), and then group like terms. (2x+x-30-20) which is 3x -50, because -30-20 is -50. The whole equation becomes 40+3x-50 = 180.

Group like terms again, so it becomes 30-50+3x = 180 which is -20+3x=180. Group like terms again but move the -20 to the side of the 180, and since it crosses the equal to sign, the - becomes + so it's 3x=180+20, resulting in 3x=200. Now to make x stand alone, we divide both sides by 3. 3x/3 is x and 200/3 is 66.6 recurring or 66.67. Now we know that x = 66.67, we substitute it in the formula for the angle at B. It becomes (2 times 66.67-30) which is 133.34 - 30, which becomes 103.34 as the answer. If told to round, it becomes 103 degrees.

Answer:

  $7734.82

Step-by-step explanation:

You want to know the amount that will result in $20,000 after 20 years when 4.75% interest is compounded continuously.

The formula for account value is ...

  A = P·e^(rt)

We want to find P when A=20,000, r=0.0475, and t=20.

  20000 = P·e^(0.0475·20)

  P = 20000·e^(-0.0475·20) ≈ 7734.82

You would have to deposit $7734.82 in the account to have $20,000 in 20 years.

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Answer:

y = (-1/3)n + 42

Step-by-step explanation:

We can use the point-slope form of a linear equation to find the slope of the line:

slope = (y2 - y1) / (x2 - x1) = (30 - 32) / (36 - 30) = -1/3

Now we can use one of the points (30, 32) to find the y-intercept:

y = mx + b

32 = (-1/3)(30) + b

b = 42

So the linear relationship between the number of bean stalks and the yield is:

y = (-1/3)n + 42

The equation that demonstrates the distributive property is 36 + 8 = 4(9 + 2), the correct option is C.

The distributive property states that when a number or variable is being multiplied by a sum or difference inside parentheses, the number or variable can be distributed or multiplied to each term inside the parentheses.

The equation that demonstrates the distributive property is C: 36 + 8 = 4(9 + 2). We can verify this by using the distributive property as follows:

4(9 + 2) = 4(11) = 44

Therefore, the equation can be written as:

36 + 8 = 44

This equation is true, which confirms that the distributive property was correctly applied.

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The complete question is:

Which equation demonstrates the distributive property?

Responses

A (9 + 2)4 = 4(9 + 2)

B 36 + 8 = 4

C 36 + 8 = 4(9 + 2)

D 36 x 8 = 8 x 36

Answer:

11 and 22

Step-by-step explanation:

radius is

r = 11 cm

diameter is

d = 2r = 2×11 = 22cm

Using Expression for Investment, the expected value of the investor's investment is $10,900.

What exactly are expressions?

In mathematics, an expression is a combination of numbers, symbols, and operators that can be evaluated to produce a value. An expression can represent a number, a variable, or a more complex combination of mathematical objects.

Now,

The expected value of the investor's investment can be calculated as follows:

E(investment) = E(investment | economy improves) * P(economy improves) + E(investment | economy stays the same) * P(economy stays the same) + E(investment | economy deteriorates) * P(economy deteriorates)

where E(investment | economy improves), E(investment | economy stays the same), and E(investment | economy deteriorates) are the expected values of the investor's investment under each scenario.

If the economy improves, the investor's investment is expected to grow to $15,000, so:

E(investment | economy improves) = $15,000

If the economy stays the same, the investor's investment will stay at $10,000, so:

E(investment | economy stays the same) = $10,000

If the economy deteriorates, the investor's investment is expected to go down to $8,000, so:

E(investment | economy deteriorates) = $8,000

Putting it all together, we get:

E(investment) = $15,000 * 0.30 + $10,000 * 0.40 + $8,000 * 0.30

E(investment) = $4,500 + $4,000 + $2,400

E(investment) = $10,900

Therefore, the expected value of the investor's investment is $10,900.

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Answer:

-79

Step-by-step explanation:

-7(x+6) + 12                       x = 7

-7( 7 + 6) + 12

-7(13) + 12

-91 + 12

-79

So, the answer is -79

As given the value of y varies directly from the cube of x so after solving the equation and finding the constant of proportionality:

when x=4, y is equal to 160.

The constant of proportionality is a value that relates two variables that are directly proportional to each other. In a mathematical equation where one variable is directly proportional to another, the constant of proportionality represents the ratio between the two variables.

If the value of y varies directly from the cube of x, then we can write:

y = kx^3

where k is a constant of proportionality. To find the value of k, we can use the given information that y=20 when x=2:

20 = k(2^3)

20 = 8k

k = 20/8

k = 2.5

Now that we have the value of k, we can use the equation to find y when x=4:

y = 2.5(4^3)

y = 2.5(64)

y = 160

Therefore, when x=4, y is equal to 160.

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Answer: (1/6)^2

Step-by-step explanation:

Answer:

The third answer is correct

Step-by-step explanation:

Use the properties of degrees:

1)

[tex] {( \frac{1}{108} })^{3} = \frac{ {1}^{3} }{ {108}^{3} } = \frac{1}{6561} [/tex]

[tex] \frac{1}{6561} ≠ \frac{1}{36} [/tex]

.

2)

[tex] ({ \frac{1}{9} })^{3} = \frac{ {1}^{3} }{ {9}^{3} } = \frac{1}{729} [/tex]

[tex] \frac{1}{729} ≠ \frac{1}{36} [/tex]

.

3)

[tex] ({ \frac{1}{6} })^{2} = \frac{ {1}^{2} }{ {6}^{2} } = \frac{1}{36} [/tex]

[tex] \frac{1}{36} = \frac{1}{36} [/tex]

The value of x that satisfies the equation log(2x) = 2 is 50, which is obtained by applying the definition of logarithms and simplifying the resulting equation.

The given equation is log(2x) = 2. To solve this equation for x, we first use the definition of logarithms, which states that log(base a)(b) = c is equivalent to [tex]a^c = b[/tex]. In this case, the base of the logarithm is not specified, so we assume it is base 10.

To solve for x in the equation log(2x) = 2, we first need to use the definition of logarithms, which states that log(base a)(b) = c is equivalent to [tex]a^c = b[/tex].

In this case, we have:

log(2x) = 2

Using the definition of logarithms, we can rewrite this as:

[tex]10^2 = 2x[/tex]

Simplifying, we get:

100 = 2x

Dividing both sides by 2, we get:

50 = x

Therefore, the value of x that satisfies the equation log(2x) = 2 is 50.

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The fractions as 50/15 and 6/15, respectively, and subtract them to obtain w = 44/15. This can be further simplified to the mixed number 2 14/15 or the decimal approximation 2.933.

To solve the equation w + 2/5 = 3 1/3, we need to isolate w on one side of the equation by subtracting 2/5 from both sides, finding a common denominator, and simplifying the resulting expression to obtain w.

w + 2/5 = 10/3

To isolate w, we need to move the constant term on the right-hand side of the equation to the left-hand side by subtracting 2/5 from both sides.

Subtracting 2/5 from both sides:

w = 10/3 - 2/5

To add these fractions, we need to find a common denominator, which is 15. So we can rewrite the fractions as:

w = (50/15) - (6/15)

Combining like terms:

w = 44/15

Therefore, w = 2 14/15 or approximately 2.933.

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The potato hits the ground approximately 0.302 seconds after it has been launched.

It is possible to solve quadratic equations of the type ax2 + bx + c = 0 using the quadratic formula, where a, b, and c are constants and x is the variable. The equation is:

x = (-b ± √(b^2 - 4ac)) / (2a)

In this case, we can use it to find the time when the potato hits the ground by setting h(t) = 0 and solving for t.

h(t) = -16[tex]t^2[/tex] + 50t + 64 = 0

Using the quadratic formula, we have:

t = (-b ± √(b² - 4ac)) / 2a

where a = -16, b = 50, and c = 64.

Plugging these values into the formula, we get:

t = (-50 ± √(50² - 4(-16)(64))) / 2(-16)

t = (-50 ± √(2500 + 4096)) / (-32)

t = (-50 ± √(6596)) / (-32)

We can simplify the square root:

t = (-50 ± 2√(1649)) / (-32)

We can also simplify the expression by dividing both the numerator and denominator by 2:

t = (25 ± √(1649)) / 16

So the time when the potato hits the ground is approximately:

t ≈ 0.302 seconds or t ≈ 2.095 seconds (rounded to three decimal places)

Note that we have two possible solutions because the quadratic equation has two roots. However, we can discard the negative value since time cannot be negative in this context.

Therefore, the potato hits the ground approximately 0.302 seconds after it has been launched.

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ASAP stands for "as soon as possible". It is often used when something needs to be done quickly or urgently. When someone says "ASAP someone please help", it means that they need help immediately and cannot wait any longer.

If you find yourself in this situation, the first step is to identify the problem and determine what needs to be done. Once you have a clear understanding of the situation, you can then reach out to someone who can help you. It's important to be specific when asking for help. Provide as much information as possible so that the person you are asking can understand the situation and offer the best possible assistance.

In summary, there is no shame in asking for help. It's better to reach out for assistance when you need it rather than struggle on your own. Don't hesitate to ask for help when you need it, and always be grateful to those who offer their assistance.

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GF preserves the identity and addition operations, and hence GF: V→U is an isomorphism.

First, we will show that GF is linear. Let u, v be vectors in V and c be a scalar in K. Then we have:

[tex]GF(cu + v) = G(F(cu + v)) = G(cF(u) + F(v)) = G(cF(u)) + G(F(v))= cG(F(u)) + G(F(v)) = c(GF(u)) + GF(v)[/tex]

Thus, GF is linear.

Next, we will show that GF is bijective. Since F and G are isomorphisms, they are both invertible. Let[tex]F^-1[/tex]and [tex]G^-1[/tex] denote their respective inverses. Then for any u in U, we have:

[tex](GF)^-1(u) = F^-1(G^-1(u))[/tex]

This shows that GF is invertible, and hence bijective.

Finally, we will show that GF preserves the identity and addition operations. Let v1, v2 be vectors in V. Then we have:

[tex]GF(v1 + v2) = G(F(v1 + v2)) = G(F(v1) + F(v2)) = G(F(v1)) + G(F(v2))= GF(v1) + GF(v2)[/tex]

Also, since F and G are isomorphisms, they preserve the identity operations:

[tex]GF(0v) = G(F(0v)) = G(0w) = 0u\\GF(v) = G(F(v)) = G(0w) = 0u if v=0v[/tex]

Thus, GF preserves the identity and addition operations, and hence GF: V→U is an isomorphism.

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To determine the number of solutions for the given equation -12g + 9 = 2q - 6-15q, we can simplify it by grouping the q and g terms together and simplifying the constants:

-12g -15q = -15

Now, we can see that this is a linear equation in two variables. When such an equation is in this form, it can either have one unique solution, no solution, or infinitely many solutions, depending on the values of the coefficients.

We can solve for one variable in terms of the other and see if any constraints come up. So, we will solve for q in terms of g:

-12g -15q = -15 => 5q = -12g - 15 => q = (-12/5)g - 3

Since we have one variable in terms of another, substituting the above value of q in the original equation we get:

-12g + 9 = 2q - 6-15q => -12g + 9 = 2[(-12/5)g - 3] - 6-15[(-12/5)g - 3] => -12g + 9 = (-24/5)g + 24 => (-60/5)g = -15 => g = 1/4

Now, we can substitute the value of g in either of the two equation and get the value of q:

q = (-12/5)(1/4) - 3

=> q = -39/20

Therefore, the given equation has exactly one unique solution, namely (g,q) = (1/4,-39/20). Thus the answer is "one solution".

Please find attached the scatter graph that illustrates the data.

b. The equation of the regression line is; y = 4.1783·x - 56.656

The gradient is 4.1783 Pounds per 1000 pounds increase in income

A scatter diagram or graph is a graph that can be obtained by plotting the values of an ordered pair on a coordinate plane.

The steps to create a scatter graph using MS Excel are as follows;

1. Enter the values for the Income in a column on MS Excel such as in column A with values in A1 to A8.

2. Enter the data for the grocery bill in the B1 to B8

3. Select the data in the above two columns, then choose Insert menu on  the Menu bar then choose the Charts drop down and choose Scatter to create the scatter graph

The equation of the regression line can be obtained from the above graph by selecting the graph then choose 'Chart Design' in the 'Chart Tools. menu that appear in the Menu bar.

Choose 'Add Chart Element' in the 'Chart Design' menu then choose 'TrendLine' then 'More Trendline Options' from the Trendline pop up menu.

The 'Format Trendline' dialogue opens at the right of the screen at at the bottom of the dialogue box select 'Display Equation on chart' check box to display the trendline equation.

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Answer:

Step-by-step explanation:

32

The correct answer is B. The spread of the data distribution for Lake Mockingbird is about 40% greater than the spread for Lake Warbler.

The statement that is NOT true about the data is B. The distribution for Lake Mockingbird shows a center that is 3 inches greater than the center of the distribution for Lake Warbler. This statement cannot be determined from the given information. The data distributions for both lakes appear to be skewed right, not skewed left, since the longer tail of the distribution is on the right-hand side of the graph. The given graphs show the amount of annual rainfall, in inches, for Lake Warbler and Lake Mockingbird for a period of 10 years. To describe the spreads of the data distributions for both lakes, we can compare their range or interquartile range. Looking at the graphs, we can see that Lake Mockingbird has a wider spread of data points than Lake Warbler. The maximum rainfall for Lake Mockingbird is approximately 30 inches, while for Lake Warbler it is approximately 24 inches. Therefore, the correct answer to the first question is B. Regarding the second question, statement B cannot be determined from the given information, as the centers of the distributions are not explicitly provided in the graphs. Therefore, the correct answer is B. Finally, it appears that both data distributions are skewed right, which means that there are more data points with low rainfall and fewer data points with high rainfall. This is evident from the graphs, which show a longer tail of the distribution on the right-hand side

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the total area of the figure is 412.16 yd² and closest option is 272.64 yd²,.

To find the area of a composite figure, we need to break it down into simpler shapes and add up their individual areas. In this case, we can divide the figure into a rectangle and two right triangles.

First, let's calculate the area of the rectangle. The base of the rectangle is 21.3 yards and the height is 12.8 yards. Therefore, the area of the rectangle is:

Area of rectangle = base x height

= 21.3 yd x 12.8 yd

= 272.64 yd²

Next, let's calculate the area of the right triangles. We can find the height of each triangle using the Pythagorean theorem.

For the triangle on the right side, we know the base is 6.4 yards and the hypotenuse is 21.3 yards (the same as the base of the rectangle). We can solve for the height (h) using the Pythagorean theorem:

h² + 6.4² = 21.3²

h² = 21.3² - 6.4²

h² = 410.45

h = √410.45

h ≈ 20.26 yards

The area of this triangle is:

Area of right triangle = (1/2) x base x height

= (1/2) x 6.4 yd x 20.26 yd

= 64.96 yd²

For the triangle on the left side, we know the base is 14.9 yards and the hypotenuse is also 21.3 yards. We can solve for the height (h) using the Pythagorean theorem:

h² + 14.9² = 21.3²

h² = 21.3² - 14.9²

h² = 99.94

h = √99.94

h ≈ 9.997 yards (rounded to three decimal places)

The area of this triangle is:

Area of left triangle = (1/2) x base x height

= (1/2) x 14.9 yd x 9.997 yd

= 74.56 yd²

Now, we can find the total area of the figure by adding up the areas of the rectangle and the two triangles:

Total area = area of rectangle + area of right triangle + area of left triangle

= 272.64 yd² + 64.96 yd² + 74.56 yd²

= 412.16 yd²

Therefore, the total area of the figure is 412.16 yd².

However, none of the given answer choices match this result. The closest option is 272.64 yd², which is the area of the rectangle only. This suggests that there may be an error in the problem statement or answer choices. If we assume that the area of the figure is intended to be the area of the rectangle only, then the answer is indeed 272.64 yd².

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If Gopal, Krishna and Govind are partners sharing profits and losses in the ratio of 5 4 3. The gaining ratio will be: (a) 5:3.

Since Krishna is retiring, her share of profit will now be divided between Gopal and Govind in the same ratio as their existing profit-sharing ratio.

The total amount paid to Krishna is 1,20,000. Out of this, Gopal has paid 80,000 and Govind has paid 40,000.

So, the share of profit purchased by Gopal is:

5/12 x 120,000 = 50,000

And the share of profit purchased by Govind is:

3/12 x 120,000 = 30,000

Now, the total profit sharing ratio of the remaining partners (Gopal and Govind) will be:

5:3 + 3:3 = 8:3

Therefore, the gaining ratio will be:

Gopal = 50,000 / (50,000 + 30,000) = 5/8

Govind = 30,000 / (50,000 + 30,000) = 3/8

So, the gaining ratio of Gopal and Govind will be 5:3, which is option (a).

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The monthly payment for this mortgage is $1,757.26.

The following can be deduced from the information:

P = $250,000

r = 0.03/12 = 0.0025

It should be noted that since APR is an annual rate, we need to divide it by 12 to get the monthly rate.

n = 15 × 12 = 180

Since the mortgage is for 15 years and there are 12 months in a year

Monthly payment will be:

= 250000 × (0.0025 × (1 + 0.0025)^180) / ((1 + 0.0025)^180 - 1)

= $1,757.26

Therefore, the monthly payment for this mortgage is $1,757.26.

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Answer:

The answer is D. 65

Step-by-step explanation:

The first step is to substitute n as 4 and k as 13. This results in the fraction

[tex]\frac{4}{20}[/tex]= [tex]\frac{13}{x}[/tex].  Since there is an equal sign, this indicates you can cross multiply. That means that you would multiply the 4 with the x and the 20 with the 13. This results in the next step, which is 4x=20(13) ---> 4x=260. Finally, to find the value of x, divide the 4 from the x to isolate it. The reasoning behind this is that you have to do the inverse operation, meaning since 4 is being multiplied by x, the inverse of this is dividing by 4 to get x by itself. Also, whatever you do on one side of the equal sign, you have to do it on the other. Therefore, [tex]\frac{4x}{4}= \frac{260}{4}[/tex] ; x=65.