A rectangular folder has a perimeter of 30 inches and an area of 54 square inches. What are the dimensions of the folder?
1 answer:
We know, perimeter = 2(l + w)
So, 2(l + w) = 30
2l + 2w = 30
Divide the equation 2,
l + w = 15
Now, Area = l * w
l * w = 54
Substitute the value of l from previous equation,
(15-w) * w = 54
15w - w² = 54
w² - 15w + 54 = 0
w² - 6w - 9w + 54 = 0
w(w - 6) -9(w - 6) = 0
(w-6)(w-9) = 0
w = 6 or 9
In short, Your Dimensions would be: 6 × 9 in
Hope this helps!
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35.001 is the closest of the 5 to 35.
Answer:
44
Step-by-step explanation:
6x +22 + 7x + 16 = 90
13x +38 =90
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x = 4
7 x 4 +16 = 44
The radius of a circle is half the length of the circumference.
So multiply 12 by itself and you get 24.
The answer is C.
7/x = 5/y
Can be changed to:
5x = 7y
So, x = (7/5)y and
y = (5/7)x
The solution to the equation would be 21.5
Why?
If you do the equation backwards
30 - 8.5 = x
You would get 21.5
You can plug it into the first equation to check!
:)
