The IRS reports it takes an average of 40 hours to understand, complete, and mail form 1040. The population standard deviation is equal to six hours. With the institution of email filing the IRS now believes completion time will change. A sample of 100 taxpayers revealed the mean time to file was 39.25 hours. At the 0.05 significance level, can we conclude that e-filing caused the time to file taxes to decrease from the 40 hour average? State the null and alternative hypothesis and the decision rule. Compute the p-value. Interpret your answer.

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(w – 2.5)(w + 2.5)

(–4v – 9)(–4v + 9)

step-by-step explanation:

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.