Boris's earnings vary directly with the number of hours he works. Suppose that he worked 9 hours yesterday and earned $135 . If he earned $120 today, how many hours did he work today?

Answer 1

To find the number of hours Boris worked today, we can set up a proportion using the information given.

Let x be the number of hours Boris worked today.

We know that Boris's earnings vary directly with the number of hours he works, so we can set up the following proportion:

9 hours / $135 = x hours / $120

Now, we can solve for x by cross multiplying:

9 * $120 = $135 * x
1080 = $135x

Divide both sides by $135 to solve for x:

1080 / $135 = x
x = 8

Therefore, Boris worked 8 hours today.