Question

1. Maria has 8 cups of a fruit punch that consists of 25% orange juice and 75% apple juice. She wants to make a drink that is 40% orange juice. How many cups of orange juice should Maria add to th mixture?

A: ?

Determine whether the trinomial is a perfect-square. If so, factor. If not, explain.

2. 16x^2 - 24x - 9

A: ?

(I think this trinomial may be a perfect-square, but my textbook tells me otherwise.

Answer 1

(4x-3)^2 = 16x^2 - 24x + 9
You have -9. A perfect square will never end in a negative number.