Question 48183
Melanie can paint a certain barn by herself in x days . Her helper Maleissa can paint the same barn by her self in 2x days.  Write a rational expression for the fraction of the barn that they complete in one day by working together .  Evaluate the expression for x=5.

Melanie DATA:
time= x days/job ; rate= 1/x job/day

Maleissa DATA:
time= 2x days/job ; rate = 1/2x job/day

Together DATA:
rate working together = 1/x + 1/2x = 3/2x job/day

Evaluate the expression for x=5:
3/10 job/day

Cheers,
Stan H.