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3 years ago

Solve for x: (x + 50) over 2 = 13x A x = 2 B x = 5 C x = 9 D x = 13

Mathematics

2 answers:

andriy [413]3 years ago

7 0

Answer:

Step-by-step explanation:

Given

$\frac{x+50}{2}$ = 13x

Multiply both sides by 2 to clear the fraction on the left side

x + 50 = 26x ( subtract x from both sides )

50 = 25x ( divide both sides by 25 )

2 = x ⇒ x = 2 → A

attashe74 [19]3 years ago

5 0

Answer: A

Step-by-step explanation:

this would be equal to (x+50)/2 = 13x

so x/2 + 25 = 13x

combine like terms

25 = 25x/2

x = 2

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inessss [21]

Answer:

The 95% confidence interval is $295.9 < \mu< 324.1$

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Step-by-step explanation:

From the question we are told that

The sample size is $n = 25$

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Given that the confidence level is 95% then the level of significance is mathematically represented as

$\alpha = 100 - 95$

=> $\alpha = 5\%$

=> $\alpha = 0.05$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table , the value is

$Z_{\frac{\alpha }{2} } =Z_{\frac{0.05 }{2} } = 1.96$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{\sigma }{\sqrt{n} }$

substituting values

$E = 1.96 * \frac{36 }{\sqrt{25} }$

$E = 14.1$

The 95% level of confidence interval is mathematically represented as

$\= x - E < \mu$

substituting values

$310- 14.1 < \mu< 310+ 14.1$

$295.9 < \mu< 324.1$

The 95% level of confidence mean that there is 95% chance that the true population mean will be in this interval

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3 years ago

What is a good source to train numerical reasoning?

LenKa [72]

Numerical reasoning tests are often done to assess a person's ability to solve or interpret numerical data. A good source to train numerical reasoning is the use of computer education software's that deals with numerical data, the use of textbooks, self test etc.

<h3>What is done in Numerical reasoning tests?</h3>

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A person can improve their numerical reasoning by;

Constant Practice

Do make a study schedule and keep to it.
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A way that a person can improve their speed in an numerical test is to reduce the time it takes a person to take in the information that is shown in the numerical reasoning questions.

Learn more about numerical reasoning from

brainly.com/question/251701

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2 years ago

The radius of the larger circle is 10 cm. The radius of the smaller circle is 5 cm. What is the approximate area of the shaded r

Fynjy0 [20]

100*3.14= 314

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5 0

3 years ago

Read 2 more answers

HELP PLEASE 20points!!!

labwork [276]

Answer:

61%

Step-by-step explanation:

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Kitty [74]

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