TextRequest reports that adults years old send and receive texts every day. Suppose we take a sample of year olds to see if their mean number of daily texts differs from the mean for year olds reported by TextRequest. a. Select the null hypothesis we should use to test whether the population mean daily number of texts for year olds differs from the population daily mean number of texts for year olds. 1. : 2. : 3. : 1 Select the alternative hypothesis we should use to test whether the population mean daily number of texts for year olds differs from the population daily mean number of texts for year olds. 1. : 2. : 3. : 1 b. Suppose a sample of thirty year olds showed a sample mean of texts per day. Assume a population standard deviation of texts per day and compute the -value. Round your answer to four decimal places. c. With as the level of significance, what is your conclusion

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true