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Zariazeevgo
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z varies jointly as x and y.if z=15 when x=14 and y=5,find y when x=21 and z=8​

Sagot :

Answer:

Formula:

z=kxy

First you need to find the value of k.

SOLUTION:

15=k(14)(5)

15=70k

15/15=70k/15

k=4.66

Tara,Let's solve for y.

8=(4.66)(21)y

8=97.86y

y=12.21

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