Question
a rectangular piece of plastic has an area of 60 square millimeters. it's perimeter is 32 millimeters. what are the dimensions
Answers
Reiny
width --- x
length ---- y
xy = 60
x+y = 16 ---> y = 16-x
x(16-x) = 60
16x - x^2 - 60 = 0
x^2 - 16x + 60 = 0
solve for x
(hint it factors)
btw, could you find 2 factors of 60 that add up to 16 ?
length ---- y
xy = 60
x+y = 16 ---> y = 16-x
x(16-x) = 60
16x - x^2 - 60 = 0
x^2 - 16x + 60 = 0
solve for x
(hint it factors)
btw, could you find 2 factors of 60 that add up to 16 ?