B is between A and C. AB = 2x + 11 and BC = 50 – 4. AC = 42. Find the value of x and the length of AB.
Is B the midpoint of AC? Explain why or why not.

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?

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