2 years ago

The values of x and y vary directly write an equation that relates x and y x = 0.1 y = 0.9

Mathematics

1 answer:

seropon [69]2 years ago

6 0

9514 1404 393

Answer:

y = 9x

Step-by-step explanation:

If you like, you can start with the proportion ...

x/y = 0.1/0.9

Multiplying by 9y gives ...

9x = y

The equation you want is ...

y = 9x

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M is directly proportional to r2.when r=2,m=14.Work out the value of r when m =224

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Answer:

$r=8$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y=kx$

In this problem

Let

$y=m$

$x=r^{2}$

substitute

$m=kr^{2}$

<u>Find the value of k</u>

For $r=2, m=14$

$14=k(2^{2})$

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the equation is equal to

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Find the value of r when m=224

substitute in the equation and solve for r

$224=(14/4)r^{2}$

$r^{2}=224*4/14$

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$r=8$

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