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3 years ago

the length of a rectangle is 7 inches greater than three times its width write an expression to represent its area

Mathematics

1 answer:

icang [17]3 years ago

3 0

Step-by-step explanation:

Let the length be L.

Let the breath be B.

So, we are given that

length of a rectangle is 7 inches greater than three times its width .

So, according to the Question,

L = 7+ 3B.

So, we know that:-

Area = Length× Breadth.

So, it will be

B × (7 + 3B) = Area.

So,

3B² + 7 is an expression to represent its area.

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Oxana [17]

Answer:

Red = 10 cm, blue = 14 cm

Step-by-step explanation:

Let the length of each red rod be r and each blue rod be b

Then we have:

3r - 2b = 2
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Multiply the first equation by 3 and the second one by 2:

9r - 6b = 6
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Add the equations to eliminate one of variables:

9r - 8r = 6 + 4
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Find the value of b:

3*10 -2b = 2
30 - 2 = 2b
2b = 28
b = 14 cm

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