Solve the problem using matrices.
-Ellen wishes to mix candy worth $2.19 per pound with candy worth $7.87 per pound to form 22 pounds of a mixture worth $6.58 per pound. How many pounds of the more expensive candy should she use?
A) 5 lb
B) 17 lb
C) 7 lb
D) 22 lb

Question

Quizplus · Accepted Answer

To solve this, set up the equations: x + y = 22 (total pounds) and 2.19x + 7.87y = 6.58 * 22 (total cost). Solving these equations, y = 17 lb.

Solve the Problem Using Matrices