Book Maths Puzzle Algebra

Solve
y = -3x^2+2x+7

Read Solution (Total 0)

Book Other Question

Sharon's revenue $R on the sale of fruitcakes is determined by the formula R = 50x-x^2. Her cost $C for producing x fruitcakes is given by the formula C=2x+40. For what values of x is Sharon's profit positive? Factoring completely:
20x^2+100x+40
20(x^2+5x+2)