Simplify the expressions by combining like terms

4r + 9r - 11r + 7r

After being rearranged and simplified, which of the following equations could be solved using the quadratic formula? check all that apply. a. 9% + 3x2 = 14 + x-1 b. -x+ + 4x + 7 = -32-9 c. 5x + 4 = 3x4 - 2 d. 2x2 + x2 + x = 30

What is perpendicular to y=-1/2x+11

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?