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3 years ago

If y varies directly as x and y = 30 when x = 6, find x when y = 45.

Mathematics

1 answer:

satela [25.4K]3 years ago

5 0

30/6 is 5 so for each 5y is 1x so 45-30 is 15 then 15/5 is 3 therefore X would be at 9 when Y is at 45

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Read 2 more answers

A jewelry box is designed such that its length is twice its width and its depth is 2 inches less than its width the volume of th

Sedaia [141]

Answer:

$Volume = 2x^{3}-4x^{2}$

Step-by-step explanation:

Let x be the width of the jewellery box

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Length of the box is twice its width

Length of the box = $2\times width$

Length of the box = $2\times x= 2x$

depth of the box is equal to 2 inches less than its width.

depth of the box = $width-2$

depth of the box = $x-2$

The volume of the box is 64 inches.

Solution:

We know that the formula of the volume is.

$Volume = length\times width\times depth$

Now we substitute all known value in above.

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Therefore, the equation of the volume of the box is.

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3 years ago