Simplify: –4(x – 2) – 5(y + 2) + (–3)(8 – 6b) a. –4x – 5y + 18b – 6 b. –4x – 5y – 18b – 22 c. –4x – 5y + 18b + 6 d. –4x – 5y + 18b – 26 evaluate 5(a – 2b) when a = –3 and b = 5. a. 65 b. 35 c. –65 d. –25 evaluate –8(x – 3y) when x = –2 and y = –4 a. 112 b. –80 c. 80 d. –16evaluate 4(a – 3b) when a = –4 and b = 6.a. 72b. 56c. –56d. –88

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?