Intermediate Algebra
posted by Jennifer .
Joe can paint a room in 6 hours while Sue can paint the same room in 5 hours. Working together, how long would it take them to paint the room?
A) What does the variable stand for?
x stands for the amount of hours to paint the room.
B)Write the equation.
1/6 + 1/5 = 1/x
c) Solve.
30x [1/6 + 1/5 = 1/x]
5x +6x = 30
11x/11 = 30/1
x = 30/11 or 2.72 hrs.
D) Write the answer in a complete sentence.
It will take Joe and Sue 2.72 hours to paint the room together.
Is this correct?
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