Sandy and sally were able to paint a a at house in 5 hours together: it takes sally 9 hours to finish this job alone. Without he
lp, how long would it take sandy to finish this job?
I don’t understand how to solve this question. plz help
1 answer:
Answer:
9/44 of an hour, or just over 12 minutes
Step-by-step explanation:
Person 1 + Person 2 divided by Person 1 x Person 2 = Both together
9 + x / 9*x = 5
9+x/9x = 5
Multiply both sides by 9x
9 + x = 45x
Subtract x from both sides
9 = 44x
Divide by 44 to get x.
9/44 of an hour
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