Who can help me with my last question?

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

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?

Given the equation    = 5, solve for x and identify if it is an extraneous solution