A railroad crew can lay 7 miles of track each day. They need to lay 203 miles of track. The length, L (in miles), that is left to lay after d days is given by the

following function.

L (d) = 203 - 7d

(How many days will it take the crew to lay all the track?)

(How many miles of track does the crew have left to lay after 18 days?)

Question

Esteban Fry

Mathematics

13 August, 19:27

A railroad crew can lay 7 miles of track each day. They need to lay 203 miles of track. The length, L (in miles), that is left to lay after d days is given by the

following function.

L (d) = 203 - 7d

(How many days will it take the crew to lay all the track?)

(How many miles of track does the crew have left to lay after 18 days?)

+2

Answers (1)

Know the Answer?

Krista Schmidt · Answer 1

It will take 29 days to lay the track

After 18 days the crew still has 77 miles of track left to lay

Step-by-step explanation:

203:7

=29 days

L = 203 - 7 (18)

L = 203 - 126

L = 77