Question

A construction crew is lengthening a road. The road started with a length of 54 miles, and the crew is adding 4 miles to the road each day. Let L represent the total length of the road (in miles), and let D represent the number of days the crew has worked. Write an equation relating L to D . Then use this equation to find the total length of the road after the crew has worked 31 days.

Answer 1

L = 4D + 54 <== ur equation

the crew worked for 31 days...so sub in 31 for D

L = 4(31) + 54
L = 124 + 54
L = 178 miles <==