P = 4s
P = (120)^1/2
4s = sqrt120
s = sqrt120/4
A = 2s
2*sqrt120/4 = sqrt120/2
Number 5 is the square root of 120 divided by 2
The equation produces a straight line.
On this one you should multiply the percentby a 100, that should give you the sales tax
Let the width of the yard be w.
Since the length is 18feet longer, l = w + 18
Perimeter for rectangle = 2(l + w)
2(l + w) = 72
2(w+18 + w) = 72 Divide 2 on both sides
(w + 18 + w) = 36
2w + 18 = 36
2w = 36 - 18
2w = 18 Divide 2 on both sides
w = 18/2
w = 9
Recall, length l = w + 18, l = 9 + 18 = 27
Hence width, w = 9, length,l = 27
Area of rectangle = l × w = 27 × 9 = 243
Area of rectangular yard = 243 square feet.
The answer is triangle number 2
