Find how much he will earn we know he will earn 8 hours sofirst find how many he earns 9 per hour 8 hou 9*8=72 72+6*numberofdeliveries=155 minus 72 6*numberofdeliviers=83 divide by 6 number of delevieries=13.8 he can't make 13.8, round up to get 14
To first get rid of the $9 per hour do 8 x 9 (=72). Then do 155- 72 (=83)to show how much more money needs to be made, then 83/the amount of money for each delivery- which is 6. Then the answer is rounded up from 13.83333 to 14 and the answer is 14.
