Question

The variable x varies directly with 5y and x=15 when y=75. Find the value of Y when x=7?

Answer 1

Answer:

$\text{The value of y when x=7 is 35}$

Step-by-step explanation:

$\textbf{Given:}$

$\text{x varies directly with 5y }$

$\implies\,x=k\,5y$

$\text{x=15 when y=75}$

$\implies\,15=k\,5(75)$

$\implies\,1=k\,5(5)$

$\implies\,1=k\,(25)$

$\implies\,k=\frac{1}{25}$

$\therefore\boxed{x=\frac{1}{5}\,y}$

$\text{when x=7,}$

$7=\frac{1}{5}\,y$

$\implies\,y=35$

Answer 2

☞I think it will help you ☜