Question

Tommy wished he practiced more before his violin concert. If he had practiced 1 1/2 more hours one week, he would have averaged 8 hours per week for the four week prior to his concert. How many hours did he practice in the 4 weeks?

Answer 1

30.5 hours

Explanation:

If he were to average 8 hours PER week for 4 weeks, his total sum would have been:

8 * 4 = 32 hours

But he fell short of it. By how much?

By
`1(1)/(2)` hours!

So, he practiced 1 1/2 hours LESS THAN 32 hours, so his practice time is:

`32-1(1)/(2)\\=32-1.5\\=30.5\\=30(1)/(2)`

So, he practiced 30.5 hours in the 4 weeks