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Phoenix [80]
3 years ago
8

Combine like terms. -5y - 5x + 5y + 5y - x + 2 - 2

Mathematics
1 answer:
Karolina [17]3 years ago
6 0

Answer:

-6x + 5y

Explanation:

-5y - 5x + 5y + 5y - x + 2 - 2

-5x - x + 10y - 5y + 2 - 2

-6x + 5y + 0

-6x + 5y

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Emily added 5 grams of water into 20 grams of 50% salt solution.
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Answers:
She made ___25___ grams of ___40___% salt solution

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The given info "20 grams of 50% salt solution" tells us that we have 10 grams of pure salt
Since 50% of 20 = 0.50*20 = 10
Put another way, we have 10 grams of pure salt out of 20 total so 10/20 = 0.50 = 50% salt solution

The 20 grams of solution updates to 25 grams of solution when we add the 5 grams of water
We don't add any salt, assuming this water is fresh water

So we still have 10 grams of pure salt out of 25 grams now
10/25 = 2/5 = 0.40 = 40% is the new salt concentration

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4 0
3 years ago
Given: ΔABC; a= 10; b = 4, and c = 11. Find the measurement of ∠B to the nearest tenth of a degree.
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