Evaluate (6x + 1) – (2x + 8) when x = 3.

How is the number of vertices for a prism related to the name of the prism

I’m stuck on this equation, anyone got the answer?

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?