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Orlov [11]
4 years ago
10

HELP FAST 5 POINTS AND A EXTRA 20 POINTS TO BRAINLIEST ANSWER

Mathematics
2 answers:
Zepler [3.9K]4 years ago
8 0
Alculate the total amount of the money he earns
12*1 = 12

Total amount of money - cost = profit
12 - 9.25 = 2.75

profit/cost * 100% = percentage profit
2.75/9.25 *100% =29.73%

correct to 2 significant figures
29.73 -> 30%
anyanavicka [17]4 years ago
5 0

Answer:

30%

Step-by-step explanation:

Profit = money made - cost

The money made was 12 bottles at 1 dollar each

Profit = 12*1 - 9.25

          =12-9.25

          = 2.75


Percent profit =  profit/ cost * 100%

                          2.75/9.25 * 100%

                           .297297297*100%

                              29.7297297%

We need to round to the ones place for 2 significant figures

                            30%

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Sonia has $40 in her lunch account and pays $2 each day to eat lunch
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Find the average rate of change of f ( x ) = 3 x 2 − 9 on the interval [ 2 , b ] . Your answer will be an expression involving b
iVinArrow [24]

Answer:

m = 3b+6

Step-by-step explanation:

Given

f(x)=3x^2 - 9

Required

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Average rate (m) is calculated using:

m = \frac{f(b) - f(a)}{b - a}

Where

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So, we have:

m = \frac{f(b) - f(2)}{b - 2}

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f(b)=3b^2 - 9

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So, we have:

m = \frac{f(b) - f(2)}{b - 2}

m = \frac{3b^2 - 9 - 3}{b - 2}

m = \frac{3b^2 - 12}{b - 2}

Expand the numerator

m = \frac{3b^2 + 6b-6b-12}{b - 2}

Factorize

m = \frac{b(3b + 6)-2(3b+6)}{b - 2}

Factor out 3b + 6

m = \frac{(b -2)(3b+6)}{b - 2}

Cancel out b - 2

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4 0
3 years ago
12 can you help me it's a A B C or D answer
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Answer:

H is the answer

Step-by-step explanation:

7 0
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The last time Victoria checked, the corn stalks in her back yard were 66.5 inches tall. Now they are 0% taller. How tall are the
yan [13]

Answer:

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Step-by-step explanation:

i can read no offense also im not good at math but can i have brain for trying

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Step-by-step explanation:

Convert ratio into fraction 86 / 128

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3 years ago
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