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ch4aika [34]
3 years ago
7

Which equations are true?

Mathematics
2 answers:
Nutka1998 [239]3 years ago
6 0
B, the rest are wrong
aleksklad [387]3 years ago
4 0

Answer:

<h2>C : None of the above</h2>

Step-by-step explanation:

A : -2+(-2) = 0 False

-2+(-2) = -4

A negative plus a negative is actually a negative. When adding signed numbers, it is useful to think of positive numbers as gains and negative numbers as losses.

B : 2-(-2) = 0 False

2-(-2) = 4

Because there is subtraction sign so if subtraction sign added to negative sign it makes positive from 2-(-2) it will be 2+2

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A water delivery truck is filling the water tank at Morgan's house. The truck arrived with 2400 L of water. The number of liters
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Answer:

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Here is a simple step-by-step explaination of how to solve this word problem:

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Next we know that the water in the truck decreases at a <u>rate</u> of 110L/min, or <u>Liters per minute</u>.

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Now that we have our equation set up, its time to solve.

To figure out how much water it needs to lose in <u>total</u> to end up with 1100 L left, we subtract 1,100 from 2,400.

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1,300/110=11.81

So the total amount of time it took for the truck to have 1,100 L left is 11.81 minutes. Your answer would be

B. L=-110t + 2400, t=11.8 min

Hope this helps! : )

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