Question 1125793
experienced does 1/9 of the job in an hour or x/9 of the job in x hours
inexperienced will do x/12 of the job in x hours
(x/9)+(x/12)=1 whole job
4x+3x=36
7x=36
x=36/7 or 5.14 hours or 5 hours and 8.5 minutes
An experienced and an inexperienced worker cannot finish the job in time.

x/9+x/9=1
2x=9
x=4.5 hours for experienced workers, and they can finish the job on time.

two inexperienced  would require 6 hours using the same approach.

For a 5 hour deadline, the cost would be $130 per experienced worker, working 4.5 hours and being paid for 5, and double for 2 or $260.