Question

if x varies directly with 5 y and x is equal to 15 when Y is equal to 75 find the value of Y when x is equal to 7​

Answer 1

Answer:

x=k5y where k is a constant

substitute values of x =15 and y =75 in this equation

15=k.5.75

This gives k=1/25

Then the equation becomes

x=5y/25

Now put x=7 in this equation

7=5y/25

y=7×25/5=35