HELPPP ASAPPP PLEAS EF is the median (mid-segment) of trapezoid ABCD. EF = 25 and AD = 40. Find BC.

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

Which expressions equal 9 when x=4 and y=1/3 a. x2+6y b. 2x + 3y c. y2-21x d. 5 (x/2) -3y e. 3x-9y