Posted by Robert on .
7. Marcus can paint a garage in 3 hours. Gina can paint the same garage in 2 hours. How long will it take Marcus and Gina to paint the garage if they work together

Algebra 
drwls,
Combined rate
= 1/3 garage/h + 1/2 garage/h
= 5/6 garage/h
5/6 garage/h * T (h) = 1 garage
T = 6/5 h = 1 h, 12 minutes.