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11Alexandr11 [23.1K]
2 years ago
13

Please help! (giving extra points)

Mathematics
2 answers:
zalisa [80]2 years ago
4 0
It's the second answer

SVETLANKA909090 [29]2 years ago
3 0
The answer is 2 2/3
The work for it:

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5 ( x + 10 ) = 30 solve for x
Vlada [557]

Answer:

x = -4

Step-by-step explanation:

Give Me brainllest

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3 years ago
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Q7 Q7.) Find the unit vector in the same direction as v.
igor_vitrenko [27]
Use Pythagorean theorem:

9i-j = sqrt (9^2 - 1^2) = sqrt(81-1) = sqrt80

now divide both terms in V by that:

u = 9/sqrt(80)i - 1/sqrt(80)j

see attached picture: 

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3 years ago
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I need help understanding what probability is​
lawyer [7]

Answer:

Probability is the likelihood or chance of an event occurring. Probability = the number of ways of achieving success. the total number of possible outcomes.

Step-by-step explanation:

Think of it as a chance or the percent of an event happening. Such as it raining on a sunny day would be 15%-0% probability.

3 0
3 years ago
5. A study found that the average time it took a person to find their dream home was 5.9 months. If a sample of
solong [7]

Answer:

The 95% confidence interval of the mean time it took a person to find their dream home is between 5.64 months and 6.16 months.

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{1-0.95}{2} = 0.025

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

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

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.

M = 1.96\frac{0.8}{\sqrt{36}} = 0.26

The lower end of the interval is the sample mean subtracted by M. So it is 5.9 - 0.26 = 5.64 months

The upper end of the interval is the sample mean added to M. So it is 5.9 + 0.26 = 6.16 months.

The 95% confidence interval of the mean time it took a person to find their dream home is between 5.64 months and 6.16 months.

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3 years ago
During one game, the Heat made 12 free throws. If their free throw percentage is 75%, how many free throws were attempted?
HACTEHA [7]

Answer:

16

Step-by-step explanation:

12 = 75%

4 = 25%

4 x 4 = 16

16 = 100%

Sorry if it's confusing but that's just how I think of it.

5 0
3 years ago
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