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Sidana [21]
4 years ago
13

Directions: Calculate the percent increase or decrease between the starting and ending

Mathematics
2 answers:
Sveta_85 [38]4 years ago
7 0

I'll do the first two to get you started

===============================================

Problem 1

A = 3 = starting value

B = 10 = ending value

C = percent change

C = [ (B - A)/A ] * 100%

C = [ (10-3)/3 ] * 100%

C = (7/3) * 100%

C = 2.3333333 * 100%

C = 233.33333%

C = 233.3%

The positive C value means we have a percent increase. If C was negative, then we'd have a percent decrease.

<h3>Answer: 233.3% increase</h3>

===============================================

Problem 2

A = 9 = start value

B = 20 = end value

C = percent change

C = [ (B - A)/A ] * 100%

C = [ (20-9)/9 ] * 100%

C = (11/9)*100%

C = 1.2222222222*100%

C = 122.22222222%

C = 122.2%

<h3>Answer: 122.2% increase</h3>
mezya [45]4 years ago
4 0
The answer is 3 and end
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Step-by-step explanation:

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B = 2x² - xy - 4y - 1 - A

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Hence

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(b)

Given A - B = x, then

x = 3xy + 8y - 1 ( add 1 to both sides )

x + 1 = 3xy + 8y ← factor out y from each term

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y = \frac{x+1}{3x+8}

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Step-by-step explanation:

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