Question

Item 12 You are downloading songs to your MP3 player. The ratio of pop songs to rock songs is 5 : 4. You download 40 pop songs. How many rock songs do you download?

Answer 1

32 rock songs

Explanation:

Using a proportion, or equivalent ratios, we can assign a variable to the number of rock songs and use cross-multiplication and divide to solve

pop/rock = 4/5 = 40/x

cross-multiply and divide:

5x = 4(40) or 5x = 160: 5x/5 = 160/5 or x = 32 rock songs

Answer 2

32 rock songs

Explanation:

Using a proportion, or equivalent ratios, we can assign a variable to the number of rock songs and use cross-multiplication and divide to solve:

`(pop)/(rock)=(5)/(4)=(40)/(x)`

cross-multiply and divide:

5x = 4(40) or 5x = 160: 5x/5 = 160/5 or x = 32 rock songs