+1443 The length of a rectangle is 3 more than twice the width. If the area is 20 square feet, what is the width of the rectangle?
a) .4 feet
b) 8 feet
c) 2.5 feet
d) 4 feet.
+1443 CPhill!!!! I haven't seen you in such a long time! I just noticed you were answering my question. Thank you!
+129899 Thanks, SMM....good to see you....I took a sabbatical (LOL!!!)
This one isn't too bad
Let L = 2W + 3
So we have
L * W = 20
(2W + 3) (W) = 20 simplify
2W^2 + 3W = 20
2W^2 + 3W - 20 = 0 factor as
(2W - 5) ( W + 4) = 0
Only the first factor helps us
Set to 0 and solve for W
2W - 5 = 0
2W = 5
W = 5/2 = 2.5 ft
