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Drupady [299]
3 years ago
8

The length of a rectangle is 2 meters more than its width. The area of the rectangle is 80 square meters. What is the length and

width of the rectangle? A. length = 10 meters, width = 8 meters B. length = 8 meters, width = 6 meters C. length = 20 meters, width = 4 meters D. length = 14 meters, width = 12 meters
Mathematics
1 answer:
insens350 [35]3 years ago
8 0

Answer:

Step-by-step explanation:

Formula

A = L * W

Givens

W = W

L = W + 2

Solution

Area = L*W

Area = (W+2)*W = 80            Remove the brackets.

Area = W^2 + 2W = 80         Subtract 80 from both sides.

Area = w^2+2W-80=80-80  Combine

Area = w^2 +2W-80 = 0        Factor.

Area = (w+10)(w - 8) = 0

W + 10 = 0 won't work

W = - 10 which isn't possible

W- 8 = 0

W = 8

L = 8 + 2 = 10

The answer looks like A

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Answer:

A Pipe that is 120 cm long resonates to produce sound of wavelengths 480 cm, 160 cm and 96 cm but does not resonate at any wavelengths longer than these. This pipe is:

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