Answer:
A, B.
Explanation:
If Matt charges $9 an hour, and he worked for 5hrs on Friday night, then that means we have to do multiplication.
So, $9x5=$45.
And then it says he babysat again on Saturday, and in TOTAL, he earned $99.
So, if he already made $45, and he has a total of $99, then we need to work backwards to figure out how much he made on Saturday.
$99-$45=$54
So, he made $45 on Friday and $54 on Saturday.
Now, we continue to work backwards and divide how much he made on Saturday ($54), by how much he charges per hour.
$54/9=6
So, Matt worked a total of 6hrs on Saturday.