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3 years ago

3 Simplify:1/4 (15 – 6) +3 : 12 A. 2 B. 3 C. 41 D. 5 7 12

Mathematics

1 answer:

zalisa [80]3 years ago

4 0

Answer: 5.25 or 5.5 [see note]

Step-by-step explanation:

1/4 (15 – 6) +3 [I'm not clear what is meant by the " : 12," so I left it out.]

1/4 (9) +3

9/4 + 3

2.25 + 3 = 5.25

===

If it is supposed to read

1/4 (15 – 6) +3/12

Then it would be

5.25 + 0.25 = 5.5

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A leprechaun places a magic penny under a girls pillow. The next night there are 2 magic pennies under her pillow. The following

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Answer:

After 47 days she will have more than 90 trillion pennies.

Step-by-step explanation:

At the beginning there was 1 penny. At the second day the amount of pennies under the pillow became 2.

The amount of pennies doubled each day. So the series is,

$1,2,4,8,16,32,.....$

This series is in geometric progression.

As the pennies from each of the previous days are not being stored away until more pennies magically appear so the sum of series will be,

$S_n=\dfrac{a(r^n-1)}{r-1}$

where,

a = initial term = 1,

r = common ratio = 2,

As we have find the number of days that would elapse before she has a total of more than 90 trillion, so

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$\Rightarrow 90\times 10^{12}\le 2^n-1$

$\Rightarrow 2^n\ge 90\times 10^{12}+1$

$\Rightarrow \log 2^n\ge \log (90\times 10^{12}+1)$

$\Rightarrow n\times \log 2\ge \log (90\times 10^{12}+1)$

$\Rightarrow n \ge \dfrac{\log (90\times 10^{12}+1)}{\log 2}$

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3 years ago

Question 5(Multiple Choice Worth 4 points) (04.07A) A line passes through (2, 8) and (4, 12). Which equation best represents the

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Step-by-step explanation:

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3 years ago

Read 2 more answers

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Answer:

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Step-by-step explanation:

Divide the first expression by the second expression.

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3 years ago

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Anna007 [38]

Answer:

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Maximum = 569.25

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3 years ago

Alexis and Paige work together as photographers for the local newspaper. Alexis is paid $25 for each news story she shoots and a

Naddik [55]

Answer:

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Step-by-step explanation:

Given that:

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Let,

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Hence,

The expression 40n+15p shows the amount paid by the newspaper if Alexis and Paige are hired together.

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3 years ago