SOLUTION: Please help me solve this question. I dont even know where to start. Thank you for your time and help the area of a rectangular wall of a barn is 120 sq ft. its length is 8ft

SOLUTION: Please help me solve this question. I dont even know where to start. Thank you for your time and help the area of a rectangular wall of a barn is 120 sq ft. its length is 8ft

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Question 495698: Please help me solve this question. I dont even know where to start.
Thank you for your time and help

the area of a rectangular wall of a barn is 120 sq ft. its length is 8ft longer than twice its width. find the length an width of the wall of the barn.
Answer by oberobic(2304) (Show Source): You can put this solution on YOUR website!
Area of a rectangle = Length * Width

(given)
.

.
Length is 8 ft greater than twice the width. (given)

Substitute for L

Multiply

Subtract 120 from both sides

Divide by 2 to eliminate the coefficient on W^2

Factor

So the width is either -10 or 6.
A negative width is nonsense, so we decide:

.
Substitute for W

Divide both sides by 6

.
ALWAYS check your work.
In this case, you cannot use the area to check because you used it to solve for L.
Looking back you can find:

Correct.
.
Answer:
Length = 20 ft.
Width = 6 ft.
.
Done

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