Question

Use a system of equations to solve the problem.

A rectangular picture frame has a perimeter of 2,200 centimeters and a width that is 300 centimeters less than its length. Find the area of the picture.
_____ cm2

Answer 1

2 L + 2 W = 2200
so
L + W = 1100

W = L - 300

L + (L-300) = 1100

2L - 300 = 1100

2 L = 1400

L = 700
then
W = 400
and
A = L * W = 280,000 cm^2

Answer 2

thank you, big help