Question

A new movie can be downloaded for $8 per movie. An older movie can be downloaded for $3 per movie. Quinn buys a total of 7 movies and spends $41.

A. define your variables. Write the system of equations and represent it as a matrix equation.

b. use matrices to solve the equation by hand

Answer 1

let be x the number of new movie, and y the older,
the matrix according to the problem is AZ=B, look at the attached file