Re-write the quadratic function below in Standard Form
y = -9(x + 1)(x – 7)

What is the value of this expression when b= 5 6 (2b-4)

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?