Lauren H. answered • 10/03/18
Tutor
4.8
(24)
Experienced High School Chemistry Teacher
the length of a rectangular frame is 5 cm more than the width
l = w + 5
the area inside the frame is 50
a = lw
50 = (w + 5)(w)
50 = w^2 + 5w
0 = w^2 + 5w - 50
0 = (w + 10)(w - 5)
w = 5 ( the negative answer of -10 doesn't make sense. Discard it)
l = 10
