A construction crew is lengthening a road that originally measured 55 miles. The crew is adding one mile to the road each day. Let L be the length (in miles) after D days of construction. Write an equation relating L to D . Then use this equation to find the length of the road after 12 days.
L = 55 miles from the beginning + 1 mile they build each day times how many days have passed, so it's gonna be: [tex]l(d) = 55 + 1 \times d \\ l(d)= 55 + d \\ l(12) = 55 + 12 \\ l(12) = 67 \: miles[/tex]
