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2 years ago

What steps is flip second fraction only?

Mathematics

1 answer:

Assoli18 [71]2 years ago

7 0

Answer:

To multiply two fractions, we multiply the numerators to get the new numerator and multiply the denominators to get the new denominator. However, we are taught that when faced with a problem such as 3⁄5 ÷ 4⁄7, we should invert the second fraction and multiply.

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1/3 X 12 = 12 X ___ = __

valkas [14]

1/3=4 hop this help you

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3 years ago

What is the solution to x + 2 = 9?

olchik [2.2K]

The answer of x=7, because 7+2=9

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3 years ago

Read 2 more answers

you want to create a 99 confidence interval with a margin of error of 25 assuming that the population standard deviation is equa

Ahat [919]

Answer:

The minimum sample size is 239.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.99}{2} = 0.005$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.005 = 0.995$ , so Z = 2.575.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Population standard deviation is equal to 1.5

This means that $\sigma = 1.5$

Margin of error of 0.25

This means that $M = 0.25$

What's the minimum size of the sample?

$M = z\frac{\sigma}{\sqrt{n}}$

$0.25 = 2.575\frac{1.5}{\sqrt{n}}$

$0.25\sqrt{n} = 2.575*1.5$

$\sqrt{n} = \frac{2.575*1.5}{0.25}$

$(\sqrt{n})^2 = (\frac{2.575*1.5}{0.25})^2$

$n = 238.7$

Rounding up:

The minimum sample size is 239.

4 0

3 years ago

For each of the examples below, identify the

Bogdan [553]

Step-by-step explanation:

from the first shape bearing of C from D is the angle formed between the north pole and D = 100°

from the second second shape the bearing of C from D is the angle formed between the north pole and D= 235°

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2 years ago

Mr. Anderson tosses a coin 15 times and it landed on tails 9 times. What is the probability of landing on tails on his 16th toss

Anestetic [448]

It is a 50 percent chance. This is because there is only two possibilities that can occur. It does not matter how many times the coin has been flipped.

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3 years ago