Minimum value of expression 5x^2-20x=?

Can someone me and plz do the problem

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two