Which expression is equivalent to 12a + 8?

The system of equations graphed below has how many solutions? y = 2x + 2

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9