Trina downloaded 3 music albums and 5 audio books one week at a cost of $49.60. the next week she downloaded 1 music album and 2 audio books at a cost of $20.50. her mother wants to write a system of equations to determine the price of one music album and one audio book. she uses the variables x and y. she lets x represent the cost of one music album. what will y represent? y = cost of 1 music album y = cost of 1 audio book y = cost of 3 music albums y = cost of 5 audio books
