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vova2212 [387]
3 years ago
9

The area of a rectangle is 42 square inches and one side is 12 inches long. Find the perimeter of the rectangle. Show your work.

Mathematics
1 answer:
LenaWriter [7]3 years ago
7 0
I might not be correct but i think Perimeter=31. Since the problem tells me that the area is 42 square inches i divided the given area (42 inches) by the given side length (12 inches), and I got 3.5. I did this because the formula for area is a=lw therefore 12×3.5=42 inches. Now that I know the missing measurement of the other side length, I can plug the numbers I have into either one of these equations. 
P=SIDE++SIDE+SIDE+SIDE OR P=2(length)+ 2(width). Please let me know whether or not you understand or have any other questions I will be more than happy to answer. Later when you reach 9th grade and become a freshmen you will learn theorems that will help make it a little bit easier and they will also remove A LOT of the algebraic work that's required to solve questions such as this one. My name is Takira and I go to LaGuardia High School for Performing Arts. Please let me know if you have any more questions.
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3 years ago
Which expression is equivalent to 14x − 7 + 3(2x − 5)?
skelet666 [1.2K]

Answer:

This equation is equivalent to 20x-22

\mathrm{Expand}\:3\left(2x-5\right):\quad 6x-15\\=14x-7+6x-15\\\mathrm{Simplify}\:14x-7+6x-15:\quad 20x-22\\=20x-22

<em>Hope this helps and have a great day!</em>

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3 years ago
The equation of a straight line is 2y+6x=-8.find the gradient of the line​
Illusion [34]

Step-by-step explanation:

Y= mx + c

2y = 3x - 8

2y = -3× - 8 ( divide all yerms by two )

y = <u>-</u><u>3</u><u> </u>× 4

2

y = <u>-</u><u>3</u><u> </u>

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7 0
3 years ago
Find the accumulated value of an investment of $7000 at 12% compounded semiannually for 12 years.
Mashcka [7]

Answer:

  $28,342.54

Step-by-step explanation:

The value of an account earning compound interest is found using the formula ...

  A = P(1 +r/n)^(nt)

where P is the principal invested at annual rate r compounded n times per year for t years.

__

You have P=7000, r=0.12, n=2, t=12.

Using these values in the formula, we find the accumulated value of the investment to be ...

  A = 7000(1 +0.12/2)^(2·12) = 7000(1.06^24) ≈ 28,342.54

The value after 12 years is $28,342.54.

_____

<em>Additional comment</em>

The time-value-of-money functions of your calculator or spreadsheet can find this for you.

7 0
1 year ago
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Georgia [21]

The answer is 26 miles.

Explanation:

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10.4 ×2÷ 20.8 +5.2= 26

5 0
3 years ago
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