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Anvisha [2.4K]
1 year ago
15

- 16m’n-(-25m’n)+(-7m’n)Which of the following is equivalent to the expression above?

Mathematics
1 answer:
Westkost [7]1 year ago
5 0

As a rule , - times - = + and - times + = -

\begin{gathered} -16m^2n-(-25m^2n)+(-7m^2n\text{ ) } \\ =-16m^2n+25m^2n-7m^2n\text{  ( based on the rule above )} \\ =+9m^2n-7m^2n\text{    ( -16 + 25 = + 9 )} \\ =+2m^2n \end{gathered}

Therefore the correct answer to the question is 2m squared n

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A random sample of 12 recent college graduates reported an average starting salary of $54,000 with a standard deviation of $6,00
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Answer: a.) $50188 to $57812

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<u>With a 95% confidence interval, the mean starting salary of college graduates is between 50605 and 57395 or </u><u>from 50188 to 57812$.</u>

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b. The mean starting salary for college students in 2017 is $50,516, which is in the confidence interval. Therefore, since we 95% sure the real mean is between 50188 and 57812, there was no significant change since 2017.

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