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sladkih [1.3K]
3 years ago
8

9. An object that has traveled 400 km in 50 hours, what was the average speed?

Mathematics
1 answer:
Effectus [21]3 years ago
4 0

Answer:

its 8

Step-by-step explanation:

Divide 400÷50

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Answer:

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Step-by-step explanation:

I hope you mean 7x²+8+5, not 7x²+8x+5.

We need to combine like terms. Anything with squared should be added together, et cetera.

(7x²+8+5)+(3x²-2x-2)

You can take out the parenthesis, because they don't matter in addition.

7x²+8+5+3x²-2x-2

Add the terms, step by step. Each bold pair needs to be added together.

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3 years ago
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