Answer:
A) A = W(W + 4)
B) Length = 7 ft
Width = 3 ft
Step-by-step explanation:
A) Let the length and width of the rectangular rug be L and W respectively.
We are told that the rug is 4 feet longer than it is wide. Thus;
L = (W + 4)
Also we are told that the area is 21 ft²
Now, formula for area of a rectangle is;
A = LW.
Thus;
A = W(W + 4)
21 = W(W + 4)
B) 21 = W² + 4W
W² + 4W - 21 = 0
Using quadratic formula to find the roots, we arrive at W = 3 ft.
Thus, L = 3 + 4 = 7 ft
Answer:
Part B: $544.5
Step-by-step explanation:
PART B:
The area of the carpet is the product of its dimensions:
.
The carpet costs $2.00 per ; therefore, the total cost of the carpet will be
.
Also, the installer charges $0.75 per to install the carpet; therefore, the total cost of installation will be
.
Thus, the total amount it will cost Amy to buy the carpet and have it installed will be
Step-by-step explanation:
1.23
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Answer:
19) 42.5
20) 19.1
21) 24
Step-by-step explanation: