186k views
5 votes
A contractor charges $ 1,200 for 100 square feet of roofing installed. At this rate, how much does it cost to have 1,100 square feet installed

User Sukhbir
by
8.1k points

1 Answer

2 votes

For this problem we can use a proportion to solve.

Set up the proportion.


(1200)/(100) = (p)/(1100)\\

Cross multiply.


1200 * 1100 = 100 * p\\1320000 = 100p

Divide.


(1320000)/(100) = (100)/(100)p\\13200 = p

So, it would cost $13,200 to have a 1,100 square foot roof installed.

User EricSchaefer
by
7.7k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories