Soccer ball profit
y=-6.x2 + 100x- 180
Soccer balls go on sale for $7.50 each. The store
also sells footballs and the manager wants to earn
a daily profit of $400 from both items. The equation
y = -4x+ + 80x - 150 models the store's daily
profit, y, for selling footballs at x dollars. Explain
how to find the price per football needed to meet
the goal.