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3 years ago

What is 2/9 multiplied by 2 as a mixed number

Mathematics

2 answers:

Gemiola [76]3 years ago

6 0

Answer:

4/9

Step-by-step explanation:

2/ 9 * 2 = 4/9

This is not a mixed number but a fraction

olga_2 [115]3 years ago

5 0

Answer:

4/9

Step-by-step explanation:

2/9 multiplied by 2 is 4/9 this can not be turned into a mixed number but can stay a fraction

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Please Help me with these question. first person to help me gets brainliest!!!!

lara [203]

4) the distance between the x-values is 3 and the distance between the y-values is 4

3² + 4² = d²

9 + 16 = d²

25 = d²

√25 = d

5 = d

Answer: C

d = $\sqrt{(x2 - x1)^{2} + (y2 - y1)^{2} }$

d = $\sqrt{(-2 - (-3))^{2} + (2 - (-4))^{2} }$

d = $\sqrt{(-2 +3)^{2} + (2 +4)^{2} }$

d = $\sqrt{(1)^{2} + (6)^{2} }$

d = $\sqrt{1 + 36}$

d = $\sqrt{37}$

d = 6.1

Answer: A

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3 years ago

if a desktop computer cost $800 and a tablet costs $400, how can someone determine how much they can buy with 20000

melisa1 [442]

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Step-by-step explanation:

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2 years ago

What is the solution to the equation? t-15=76

Ainat [17]

Answer:

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Step-by-step explanation:

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2 years ago

F(x) = -x +6 and g(x) = f(x+3), write an equation for function g.

Lostsunrise [7]

G(x)=-(x+3)+6
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g(x)=-x+3

5 0

3 years ago

You are going to estimate how long a person holds down a button on their calculator by randomly selecting people and asking them

Ray Of Light [21]

Answer:

You need to have 538 people in your study.

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:

$\alpha = \frac{1 - 0.94}{2} = 0.03$

Now, we have to find z in the Ztable as such z has a pvalue of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.03 = 0.97$ , so Z = 1.88.

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.

You practiced on the people at work and found a standard deviation of about 0.37 seconds.

This means that $\sigma = 0.37$

You want to get a 94% confidence interval that is only 0.06 in width.

This means that $M = \frac{0.06}{2} = 0.03$

How many people do you need to have in your study?

This is n for which M = 0.03. So

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

$0.03 = 1.88\frac{0.37}{\sqrt{n}}$

$0.03\sqrt{n} = 1.88*0.37$

$\sqrt{n} = \frac{1.88*0.37}{0.03}$

$(\sqrt{n})^2 = (\frac{1.88*0.37}{0.03})^2$

$n = 537.6$

Rounding up:

You need to have 538 people in your study.

7 0

2 years ago