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frosja888 [35]
3 years ago
9

HURRY PLS 7TH GRADE MATH I NEED HELP I HAVE LESS THAN 5 MINS TO DO THIS

Mathematics
1 answer:
Harrizon [31]3 years ago
5 0

Answer:

35 = 8 + x + x + x + x + x +x

35 = 8 + 6x

6x + 8 = 35

35 - 8 = 6x

Step-by-step explanation:

hope this helps:)

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Simplify the expression 224,000 X 0.00021 using scientific notation and express your answer in scientific notation.
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Answer:4.704×10^1

Step-by-step explanation:

To simplify 224000×0.00021 in scientific notation

We get

224000×0.00021

47.04

4.704×10^1

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Step-by-step explanation:

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What is the slope of the line through the point A(-3,4) and B(2,-1)
Best answer
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3 years ago
The Department of Transportation would like to test the hypothesis that the average age of cars on the road is less than 12 year
puteri [66]

Answer:

z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29  

Step-by-step explanation:

information given

\bar X=10.6 represent the sample mean  

\sigma=4.1 represent the population standard deviation

n=45 sample size  

\mu_o =12 represent the value that we want to test  

\alpha=0.05 represent the significance level for the hypothesis test.  

z would represent the statistic

p_v represent the p value for the test

Hypothesis to test

We want to test if the true mean is less than 12, the system of hypothesis would be:  

Null hypothesis:\mu \geq 10  

Alternative hypothesis:\mu < 10  

The statistic is given by:

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

Replacing the info given we got:

We can replace in formula (1) the info given like this:  

z=\frac{10.6-12}{\frac{4.1}{\sqrt{45}}}=-2.29  

8 0
3 years ago
What is 2(5-3v)+9v=28?
almond37 [142]
10-6v+9v=28
10+3v=28
-10 -10
3v=18
3 3
v=6
7 0
3 years ago
Read 2 more answers
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