The equation relating L to D will be L = 12 + D.
From the information, the construction crew is lengthening a road that originally measured 12 miles and the crew is adding one mile to the road each day.
Let L be the length (in miles) after D days of construction.
Therefore, the equation will be:
L = 12 + D
Learn more about expressions on:
brainly.com/question/25968875
#SPJ1