Answer:
54.5
Step-by-step explanation:
72 minutes
We require their hourly rate of work
Maria cleans
the house in 1 hour
Sasha cleans
of the house in 1 hour
let x be the time it takes both to clean the house
+
= 
multiply through by 6x
3x + 2x = 6
5x = 6 ⇒ x = 
Together they can clean the house in 72 minutes
This equation does not have any zeros. Use the formula of (b*b)-4(a)(c).
OptionC is the answer..!!
Hope this helps you!!!