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stiv31 [10]
3 years ago
13

3m=2(4+x) solve for x

Mathematics
2 answers:
dimulka [17.4K]3 years ago
6 0
3m=2(4+x)
To solve for x, you need to get x by itself.
1. Distribute: 3m=2(4+x)
3m= 8 + 2x
2. Subtract 8.
3m- 8= 2x
3. Divide all numbers by 2 in order to isolate the x.
3/2m-8= x
This is the furthest the equation will go since there is no number in the place of x. I hope this helps! (: Good luck.
algol133 years ago
4 0
Simple.........

3m=2(4+x)

Simplify...

3m=2(4+x)

3m=8+2x

Isolate the variable....

3m=8+2x
-8      -8

3m-8=2x

\frac{3m-8}{2} = \frac{2x}{2}

\frac{3m}{2} -4=x

Thus, your answer.
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2 years ago
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A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it needs to be replaced. From past
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<h2><u>Answer with explanation</u>:</h2>

Let \mu be the distance traveled by deluxe tire .

As per given , we have

Null hypothesis : H_0 : \mu \geq50000

Alternative hypothesis : H_a : \mu

Since H_a is left-tailed and population standard deviation is known, thus we should perform left-tailed z-test.

Test statistic : z=\dfrac{\overlien{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

where, n= sample size

\overline{x}= sample mean

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For n= 31,\ \sigma=8000,\ \overline{x}=46,800\ \&\ s=46,800, we have

z=\dfrac{46800-50000}{\dfrac{8000}{\sqrt{31}}}=-2.23

By using z-value table,

P-value for left tailed test : P(z≤-2.23)=1-P(z<2.23)   [∵P(Z≤-z)=1-P(Z≤z)]

=1-0.9871=0.0129

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[We reject the null hypothesis when p-value is less than the significance level .]

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3 years ago
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Is it multiple choice or do you have to write a answer?
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