Ask Question
23 June, 11:50

The music department orders 4 times as many Rock CDs as Jazz CDs. If the department orders 550. CDs, how many of CDs are rock?

+3
Answers (1)
  1. 23 June, 12:16
    0
    440 Rock CDs

    Step-by-step explanation:

    Let number of rock CDs be "r", and

    number of Jazz CDs be "j"

    4 times as many Rock as Jazz, so we can write:

    r = 4j

    Total of 550 CDs, thus we can write equation 2:

    r + j = 550

    Now we replace 2nd equation with 1st equation and find j first:

    r + j = 550

    4j + j = 550

    5j = 550

    j = 550/5

    j = 110

    Now, finding r:

    r = 4j

    r = 4 (110)

    r = 440

    There are 110 Jazz CDs and 440 Rock CDs
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “The music department orders 4 times as many Rock CDs as Jazz CDs. If the department orders 550. CDs, how many of CDs are rock? ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers