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Alex777 [14]
2 years ago
12

According to the following table, how many fewer post office locations existed in 2009 than in 1930?

Mathematics
2 answers:
yawa3891 [41]2 years ago
6 0
A Hopes that Helps

:)

gavmur [86]2 years ago
3 0
The answer would be 21,882.
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The sides of a right triangle are x, x+21, and x+27. what is the length of the hypotenuse
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Answer: 51 uinits

The three numbers are x , x + 21 and x + 27. 
The greatest of the 3 numbers is x + 27, so x + 27 has to be the hypotenuse.

----------------------------------------------
Pythagoras Theorem
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a² + b²  = c²

x² + (x+21)² = (x+27)²

x² + x² + 42x + 441 = x² + 54x + 729

x² - 12x -288 = 0

(x - 24)(x + 12) = 0

x = 24 or x = -12 (rejected, length cannot be negative)

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Find hypotenuse
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 Hypotenuse = x + 27 = 24 + 27 = 51 units

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Answer: 51 units
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