Answe is B: 50
It needs to equal 180 so
100+30=130
180-130=50
Answer:
2.4 hours or 2 hours and 24 minutes
Step-by-step explanation:
Jack mows 1/6 of the lawn per hour while Marilyn mows 1/4 of the lawn together. Adding up those rates yields in their combined mowing rate:

The time required for them to mow the entire lawn is:

It would take them both 2.4 hours to mow the lawn together.
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A = -11
B= -12
This is because of how calculations work in negatives. Because they are both negative they work similarly to addition