Answer:

Step-by-step explanation:

You can take out 8 so it would be
1
----
18
let x =the number
Step-by-step explanation:
81+x=3x-39
group like terms
81+39=3x-x
120=2x
120/2=2x/2
60=x
therefore x =60
So the first one is -0.5 and second is -0.5 the third one is -0.5 and the fourth is -0.25 so I would say that is D
All you need to do is add all 7 job hours, and divide the total by 7. Your answer should be 7