4. A formula used for calculating velocity is v=1/2at^2

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3