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Nadusha1986 [10]
3 years ago
9

0 If x and y vary inversely and y=6 as x=7, what is the constant of variation?

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
3 0

Answer:

k = 42

Step-by-step explanation:

given that x and y vary inversely then the equation connecting them is

y = \frac{k}{x} ← k is the constant of variation

To find k use the condition y = 6 when x = 7

k = yx = 6 × 7 = 42

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A square has side length of 9 in. If the area is doubled, what happens to the side length?
Alika [10]

Answer:

The side length is multiplied by \sqrt{2}

Step-by-step explanation:

we know that

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If the area is doubled

then

The area of the larger square is

A1=(2)81=162\ in^{2}

Remember that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

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y ---> the area of the original square

so

z^{2}=\frac{x}{y}

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z^{2}=\frac{162}{81}

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therefore

The side length is multiplied by \sqrt{2}

7 0
3 years ago
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qaws [65]
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5 0
2 years ago
Which of the following are solutions to the equation below? Check all that apply. x2 + x - 20 = 0
Mila [183]
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7 0
3 years ago
Read 2 more answers
If....................
kobusy [5.1K]

Answer:

C  - 22

Step-by-step explanation:

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f(3)  = 3 (3)^2 - 5 = 22

g(3) =  -1

22 * -1  = -22

5 0
1 year ago
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