A construction crew is lengthening a road. The road started with a length of 56 miles, and the crew is adding 2 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 39 days.
The equation relating L to D is:
L = 56 + 2D
To find the total length of the road after 39 days:
L = 56 + 2(39)
L = 56 + 78
L = <<56+78=134>>134
The total length of the road after 39 days is 134 miles.