mosope39 mosope39

03-08-2021
Mathematics

contestada

if √x-5 varies directly as y and x=30 when y= 2, find the value of x when y=8.

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Аноним Аноним

05-08-2021

Answer:

let,

√x-5=ky

x=30 when y=2

√30-5=2k

or, k=(√30-5)/2

now, when y=8

√x-5=8×(√30-5)/2

or, √x-5=4√30-20

or, √x=4√30-15

or, x=(4√30-15)²

or, x=47.73..

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