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MArishka [77]
3 years ago
9

The length of a rectangle is five less than three times the width. The perimeter is 46 inches .Find the length and width

Mathematics
1 answer:
zysi [14]3 years ago
7 0
Let l represent length, and w represent width
l=3w-5

P=2(l+w)
46=2(l+w)
Divided 2 for both side
l+w=23
Now, I substitute l=3w-5 into this equation
3w-5+w=23
4w-5=23
Add 5 for both side
4w=28
Divided 4 for both side
w=7 inches
l=3w-5
l=3(7)-5
l=21-5
l=16 inches. As a result, the length is 16 inches, and the width is 7 inches. Hope it help!
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Answer:

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Step-by-step explanation:

Solve using foiling. Ignore the -1 to begin with and just look at the part in parenthesis. Do x from the first parenthesis times the stuff in the second parenthesis.

ie: x(x) and x(6)

ie: x^2 + 6x

Then do the 5 times the things in the second parenthesis.

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ie: 5x + 30

Then add what you got from multiplying the first value to what you got from multiplying the second.

ie: x^2 + 11x + 30

This is a trinomial because it has three different variables. Now change all the signs to negative because of the -1 out front.

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Answer:

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Step-by-step explanation:

Firstly, move over the negative 3/4 fraction (don't forget to swap the operation i.e subtract to add):

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Now, to add the two fractions, simply multiply the numerator and denominator by 3:

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Now add this to the other fraction:

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This can be simplified down by dividing both the numerator and denominator by 4:

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Remove the y out of the fraction:

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y = \frac{4*8}{3}

y = \frac{32}{3}

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