Idon't know how to answer it proportional and if it is how do you it's not why is it not?

Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

What is the volume of a cone with a height of 6 cm in the radius of 2 cm