Find y when x=9 if y varies directly as the square of x, and y=100 when x=5

Question

Mathematics

Boo Boo

14 February, 16:26

Find y when x=9 if y varies directly as the square of x, and y=100 when x=5

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Answers (1)

Know the Answer?

Mekhi Rosario · Answer 1

If y=100 when x=5, then

xz=y (or x times z=y)

so now we know that there is a z, too!

for this problem:

we know that:

x=9

y=? answer: if x=9, then y=180

z=20

20

x 9

___

180

$orry if I confused you!