Help what's the answer​

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

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 difference between the predicted value and the actual value