Solve the problem using matrices.
-Ellen wishes to mix candy worth $\$ 1.66$ per pound with candy worth $\$ 7.29$ per pound to form 27 pounds of a mixture worth $\$ 5.41$ per pound. How many pounds of the more expensive candy should she use?
A) $9 \mathrm { lb }$
B) $18 \mathrm { lb }$
C) $23 \mathrm { lb }$
D) $11 \mathrm { lb }$

Question

Quizplus · Accepted Answer

To solve this, set up the equations: $x + y = 27$ and $1.66x + 7.29y = 5.41 \times 27$. Solving these using matrices, we find $y = 18$, meaning 18 pounds of the more expensive candy is needed.

Solve the Problem Using Matrices $1.66\$ 1.66$1.66 Per Pound with Candy Worth

Solve the Problem Using Matrices $\$ 1.66$ Per Pound with Candy Worth