Urgent! what is the answer to b? ?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq