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3 years ago

Write 23/25 as a decimal

Mathematics

1 answer:

Lina20 [59]3 years ago

5 0

The answer is 0.92
Your welcome :)

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A photograph is reduced by a scale factor of 3/8 . If the original length of the photograph was 20 inches, what is the length of

Ksju [112]

To solve this problem you must apply the proccedure shown below:

1. You have that the following information given in the problem above: The<span> photograph is reduced by a scale factor of 3/8 and the original had a length of 20 inches,

2- Therefore you have:

length=20 inches-</span>(20 inches x 3/8)<span>
length=20 inches-7.5 inches
length=12.5 inches

3- Then, as you can see, the answer is: 12.5 inches.</span>

8 0

4 years ago

Any system of government based on rule by the people is called

galina1969 [7]

Answer:

a democracy

I hope this helps!

7 0

3 years ago

To solve this system using the addition method, you would need to multiply the first equation by what number in order for the y'

yanalaym [24]

You multiply 3x - y = 3.
So then it's:
6x - 2y = 3
-2x + 2y =6

which equals 4x = 9

8 0

3 years ago

Plot the following equation using the x- and y-intercepts. Include at least one additional point on the line. Prove that the x-i

Drupady [299]

X-intercept is 3 and y-intercept is -2

3 0

3 years ago

A survey claims that a college graduate from Smith College can expect an average starting salary of $ 42,000. Fifteen Smith Coll

jek_recluse [69]

<h2>Answer with explanation:</h2>

Let $\mu$ be the average starting salary ( in dollars).

As per given , we have

$H_0: \mu=42000\\\\ H_a:\mu$

Since $H_a$ is left-tailed , so our test is a left-tailed test.

WE assume that the starting salary follows normal distribution .

Since population standard deviation is unknown and sample size is small so we use t-test.

Test statistic : $t=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}}$ , where n= sample size , $\overline{x}$ = sample mean , s = sample standard deviation.

Here , n= 15 , $\overline{x}= 40,800$ , s= 225

Then, $t=\dfrac{40800-42000}{\dfrac{2250}{\sqrt{15}}}\approx-2.07$

Degree of freedom = n-1=14

The critical t-value for significance level α = 0.01 and degree of freedom 14 is 2.62.

Decision : Since the absolute calculated t-value (2.07) is less than the critical t-value., so we cannot reject the null hypothesis.

Conclusion : We do not have sufficient evidence at 1 % level of significance to support the claim that the average starting salary of the graduates is significantly less that $42,000.

3 0

3 years ago