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Helga [31]
3 years ago
14

H

Mathematics
1 answer:
Sav [38]3 years ago
5 0

Answer:

What is the perimeter of a rectangle that is 18 inches wide and 23 inches long?

P = 2(l+w)

l = 23, w = 18

P = 2(23 + 18)

P = 2(41)

P = 82

So the perimeter of the rectangle is 82 inches.

Hope this helped! Have a great rest of your day! :)

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Elina [12.6K]

You want to compare the square root of 55 using "mental math". Start off by choosing two perfect squares that you can think of that are close to 55.

If you don't know perfect squares then start with the number 2 and multiply it by itself. 2 times 2 equals 4, so 4 is a perfect square.

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√55 < 7.7

(The actual square root of 55 is ~7.4, so we were correct in determining the answer without using a calculator!)

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