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3 years ago

Help please! I’ll give brainliest if correct!

Mathematics

1 answer:

Marrrta [24]3 years ago

4 0

I think b is y would 15 and x is 3 making 15=3•5 or 15•3=45

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In the country of Apexistan, 7% of the population was unemployed in September of 2007. If there were 147,000,000 people willing

Natali [406]

147,000,000*7%= 10290000

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3 years ago

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Joni made a down payment of $1,600 on a car that was 20% of the total price what was the total price

zvonat [6]

We know that 20 percent is 1/5
$1,600 = (1/5)*x\\ 1,600 * 5 = x 8,000 = x$
total price is $8,000

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3 years ago

A Standard number is<br> tossed find each<br> Probability.<br> P (4 or less than 6)

Klio2033 [76]

the probability of rolling 4 or a number less than 6 is P = 5/6

<h3 /><h3>How to find the probability?</h3>

The standard number cube has the outcomes {1, 2, 3, 4, 5, 6}

We want to find the probability of rolling 4 or a number less than 6. (4 is a number less than 6).

The outcomes that meet that condition are:

{1, 2, 3, 4, 5}

So 5 out of 6 outcomes meet the condition, then the probability is:

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If you want to learn more about probability:

brainly.com/question/25870256

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3 0

1 year ago

Suppose that scores on the mathematics part of a test for eighth-grade students follow a Normal distribution with standard devia

riadik2000 [5.3K]

Answer:

We need an SRS of scores of at least 153.

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:

$\alpha = \frac{1-0.9}{2} = 0.05$

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 $1-0.05 = 0.95$ , so $z = 1.645$

Now, find 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.

How large an SRS of scores must you choose?

This is at least n, in which n is found when $M = 20, \sigma = 150$ . So

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

$20 = 1.645*\frac{150}{\sqrt{n}}$

$20\sqrt{n} = 1.645*150$

$\sqrt{n} = \frac{1.645*150}{20}$

$\sqrt{n} = 12.3375$

$(\sqrt{n})^{2} = (12.3375)^{2}$

$n = 152.2$

Rounding to the next whole number, 153

We need an SRS of scores of at least 153.

8 0

3 years ago

Can someone put an answer for each box plzzzz.

Dahasolnce [82]

We need the drop down options..

7 0

3 years ago