3 years ago

What is 999 - 1 -1 1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 +1 + 11 -1 = ???

Mathematics

2 answers:

atroni [7]3 years ago

8 0

988:)))))))))))))) i hope its true

Ulleksa [173]3 years ago

4 0

Answer: Hello!

your answer is

<h2>990</h2><h3>pls brainliest :)</h3>

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Sergio [31]

Let

x-------> the number of fiction books

y-------> the number of nonfiction books.

we know that

$x+y=26$ -----> equation $1$

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Add equation $1$ and equation $2$

$x+y=26\\x-y=12\\ ------\\ 2x=38\\ x=38/2\\x=19\ fiction\ books$

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Part a) the number of fiction books is $19\ fiction\ books$

Part b) the number of nonfiction books is $7\ nonfiction\ books$

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3 years ago

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2 years ago

Find the speed of a car in miles per hour, if its wheels, that have a diameter of 18 inches, travel at a rate of 10 revolutions

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