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Sliva [168]
3 years ago
5

6th grade math! Help me if you can! C;

Mathematics
1 answer:
xxMikexx [17]3 years ago
5 0

<h3><u>Original Rate</u>                     <u>Unit Rate</u>                   </h3>

    90 Miles                                 45 Miles                  

     2 Hours                                   1 Hour    

Answer:  <u><em>The Train  travels 45 miles in one hour.</em></u>

How i got the answer? I divied the 90 by 2 because we already know the miles/hour for 2 hours and we need 1 hour.

<em><u>Give Brainliest If You Please</u></em>

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I need someone to answer this question the answer choices are below
olga nikolaevna [1]

Answer:

The answer is A, 18.84.

Step-by-step explanation:

The two points are 6 places apart, so that can be 6 units as radius. To find the circumference of a circle you do r x 3.14 (to abbreviate pi). 6 x 3.14 is 18.84 so A is your answer.

8 0
2 years ago
Read 2 more answers
........????????....
LUCKY_DIMON [66]

Answer:

83438143e + 21

Step-by-step explanation:

83438143e + 21

5 0
3 years ago
-20= -4x -6x + 2(10x)
ki77a [65]

Answer:

x = -2

Step-by-step explanation:

-20 = -4x - 6x + 2(10x)

Simplify both sides:

-20 = -4x - 6x + 20x

Combine like terms:

-20 = 10x

Isolate the variable:

x = -2

4 0
3 years ago
An entrepreneur is considering the purchase of a coin-operated laundry. The current owner claims that over the past 5 years, the
kow [346]

Answer:

z=\frac{640-675}{\frac{75}{\sqrt{30}}}=-2.556    

For this case we don't have the significance level provided \alpha but we know the final conclusion and on this case is not reject the null hypothesis, so that means :

p_v >\alpha

Where p_v = 2*P(z represent the p value for this test.

So then we can't conclude that we have a significant difference from the specified value of 675 for the true mean.

Step-by-step explanation:

Data given and notation  

\bar X=640 represent the sample mean

\sigma=75 represent the population standard deviation for the sample

n=30 sample size  

\mu_o =675 represent the value that we want to test

\alpha represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is equal to 675 or no, the system of hypothesis would be:  

Null hypothesis:\mu = 675  

Alternative hypothesis:\mu \neq 675  

If we analyze the size for the sample is = 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

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

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

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

z=\frac{640-675}{\frac{75}{\sqrt{30}}}=-2.556    

For this case we don't have the significance level provided \alpha but we know the final conclusion and on this case is not reject the null hypothesis, so that means :

p_v >\alpha

Where p_v = 2*P(z represent the p value for this test.

So then we can't conclude that we have a significant difference from the specified value of 675 for the true mean.

4 0
3 years ago
Find the measure of each exterior angle of a regular nonagon.
Sati [7]

Answer:

360°÷9

Step-by-step explanation:

All exterior angles should add up to 360°.

The nonagon is a regular polygon hence all the exterior angles are the same size.

∴ 360°÷9= 40°

8 0
3 years ago
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