Answer:

Step-by-step explanation:

Distribute negative sign.

Combine like terms.


Answer:
See Explanation
Step-by-step explanation:
The question is not clear. However, I will treat the question as:

and:


Solving:
and 

Divide both sides by 26


Divide both sides by 50

Solving
and 

Express 1 as 2^0

Remove bracket

Cancel out 2

Divide both sides by 6



Express 1 as 5^0

Cancel out 5^0

Answer:
So the answer for this case would be n=107 rounded up to the nearest integer
Step-by-step explanation:
Information given
the sample mean
the sample deviation
the sample size
Solution to the problem
The margin of error is given by this formula:
(a)
And on this case we have that ME =0.001 and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
We can use as estimator of the real population deviation the sample deviation for this case
/ The critical value for 99% of confidence interval is given by
, replacing into formula (b) we got:
So the answer for this case would be n=107 rounded up to the nearest integer
The difference between both unit rates rounded off to the nearest tenth is: 0.4 meters per second
Step-by-step explanation:
We have to calculate his unit rate for both type of races
So,
<u>Unit rate for 400m race:</u>
Distance = 400m
Time = 43 sec

<u>Unit rate for 300m Race:</u>
Distance = 300m
Time = 31 sec

The difference between both unit rates is:

Hence,
The difference between both unit rates rounded off to the nearest tenth is: 0.4 meters per second
Keywords: Unit rate, Speed
Learn more about unit rate at:
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Answer:
Expression
Step-by-step explanation:
2,3, and 7 are coefficient .
x and y are constant