9 less means subtract
the product of 5 and the number n mea multiply 5 and n
D. 5n-9
I hope this helps you
4plumbers +5helpers =182
5plumbers +6helpers =224
-24plumbers -30helpers =1092
25plumbers+30helpers =1120
1plumbers =28
4.28+5helpers =182
5helpers =70
1helpers=14
3180 because you divide 31800 by 10
A Coefficient is the answer
2238 - 300 = 1938 ft is your answer