Question

A construction crew is lengthening a road that originally measured 45 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 21 days.

Answer 1

The equation would be L = 1d + 45
After 21 days it would be
L = 1(21) +45
L = 21 + 45
L = 66 miles after 21 days