Question

guillen floors advertise the same type of carpet at a cost of 10% less per square foot then Harlem Hardware determine the cost of 700 square feet of carpet if it is bought from guillen floors

Answer 1

This question is incomplete. Harlem sells 500 square feet at $750
cost per square foot = 500/750 = $1.50 
10% of $1.50 is 0.15
cost per square foot - 10% discount = $1.50 - $0.15 = $1.35
Therefore, Guillens cost for 700 square foot is $1.35 * 700 = $945