Yes you are right because you understand the terms
For this case what you must do is add the number of hours to perform the different activities.
We have then:
14 person-hours of labor to break up to driveway and clear away the rubble.
8 person-hours of labor to pour and smooth concrete for the new driveway.
Adding both activities we have
14 + 8 = 22
answer
it takes to break up to driveway, clear away the rubble, pour the concrete, and smooth the concrete about 22 person-hours of labor
If x = 8, then the factor is (x - 8); likewise, if x = -5, then the factor is (x + 5). FOIL those together and get B
