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. Show all work

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. Show all work

anonymous · Answer

Let x = # of new movies
Let y = # of old movies

8x + 3y = 41
x + y = 7

anonymous · Answer

Do you understand part a) ? One equation is the cost the other is the amount of movies

anonymous · Answer

thats the answer for one

anonymous · Answer

yes. What is the matrix we can make from those equations

anonymous · Answer

whats B

anonymous · Answer

What is the matrix you can make from those equations?

anonymous · Answer

idk

anonymous · Answer

ex)
ax + by = c
dx + y = e

a   b   |   c
d   1   |   e

anonymous · Answer

is that B.

anonymous · Answer

I don't give answers. That was an example. Follow the patten and you'll get the matrix then you need to solve the matrix. Look up matrices.

anonymous · Answer

whats the matrix