Answer:
$216
Explanation:
First, find out what Mary makes every hour. To find this, we divide 144 by 8.
144/8 = $18
This means that Mary makes $18 per hour.
Now, we find out how much Mary would make if she worked for 12 hours:
x = # of hours worked
18n
18(12)
$216
Therefore, Mary would make $216 in 12 hours.
Hope this helps!