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victus00 [196]
3 years ago
9

Write an inverse variation equation that relates x and y. With x being 10 and y being 2

Mathematics
1 answer:
yulyashka [42]3 years ago
7 0

Answer:x=20/y

Step-by-step explanation:

x α 1/y

removing the constant of proportionality sign α and replace it with =k

x = k/y

x=10 y=2

10 = k/2

Cross multiply

10x2=k

20=k

k=20

Substitute k=20 in x=k/y

x=20/y.........required equation

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ANSWER

D. 13

EXPLANATION

We have

f(x) =  \frac{2x + 1}{x - 4}

To find

{f}^{ - 1} (3)

means we want to find an x-value whose image is 3.

\frac{2x + 1}{x - 4}  = 3

We cross multiply,

2x + 1 = 3(x - 4)

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2x + 1 = 3x - 12

Combine like terms,

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jeka94

Answer:

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