Problema Solution
Eighteen pencils cost $1.44. At this rate, what is the cost of seven pencils?
Answer provided by our tutors
let x represent the cost of 7 pencils
since the cost is directly proportional with the number of pencils we have:
18 : 1.44 = 7 : x
by solving we find:
x = $0.56
click here to see the step by step solution of the equation:
the cost of 7 pencils is $0.55 or 55 cents.