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the length of the rectangle is 2 cm less than 3 times its' width. if the perimeter of the rectangle is 124cm, what are the dimensions of the rectangle

Sagot :

Felixgiradorodriguez

formula kong panu mag solve Step-by-step explanation:

The area of a rectangle is 24 cm 2 . The width is 2 cm less than the length. How do I find the length and width of the rectangle?

The area of a rectangle is 24 cm2. The width is 2 cm less than the length. How do I find the length and width of the rectangle?

While this has all the hallmarks of a homework question, that implication doesn't concern me.

I've used some other “homework questions" as a basis for tutoring some of my students and they can be a valuable resource.

Further I've sometimes found that a respondent has published their analysis and got a different answer to my answer, suggesting either that they or I made an error, or the question is open to more than a single interpretation.

Fact (1). The area of the rectan

How do you find the length and width of a rectangle if you only have the area?

The width of a rectangle is 8 cm less than twice its length. If the area of the rectangle is 120cm^2, what are the dimensions of the rectangular?

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If the length of a rectangle is 12cm more than twice its width, and the area of the rectangle is 169cm square, what is its length and width?

The length of a rectangle is 2 feet more than it's width. How do you find the dimensions of the rectangle if its area is 63 square feet?

Given:

A rectangle

Area = A = 24 cm^2

Width W = L - 2 , Length L

Find = Width & Length

Plan: use the area formula for a rectangle to get an equation and solve.

A = L x W

24 = L•(L -2) = L^2 -2L. Now solve for

L^2 -2L -24 = 0. Solve by factoring if possible else use the quadratic formula.

(L - 6)(L + 4) = 0 Therefore, L - 6 = 0 or L + 4 = 0

Solution Set {6, -4} to the equation. Measurement are positive. so -4 is an extraneous solution.

Now L = 6 , W = L -2 = 6 - 2 = 4

Check: 6 x 4 = 24 cm^2 OK

Answer: length = 6 cm , Width = 4 cm

This type of problem is typical. The formulas change, the dimensions change,and they alway require an equation to be solved. Make sure your answers have units on them.

christophercaleza62

Answer:

so the length is 8

Step-by-step explanation:

area = length (l) * width (w)

80 = l * w

Since l = w -2 , 80 = (w - 2) * w

Simplify: w2 - 2w = 80

Solve by completing the square:

w2 - 2w +1 = 80 + 1

(w - 1)2 = 81

w - 1 = ± 9

w = 10

So the length is 8.

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