Question

It is given that x varies directly with y2
and x = 3 when y=9. Find the value of x
when y = 45.​

Answer 1

Answer: x= 15. Step-by-step explanation: x/y=k. 3/3^2=k. 3/9=k. so ,k =1/3. finding value of x when y is 45. (as y =45 and k = 1/3 ). x/y=k. x/45=1/3. x= 1/3×45. x= 15.

Answer 2

Answer:

15

Step-by-step explanation:

x=3 and x

y=9 and 45

Now we have to do this in direct proportion

so; we have to do cross multiplication in Direct proportion

A|q

3×45=9×x

135=9x

135÷9=x

15=x

so;x=15 is Answer