HELPPP MEEE PLEASE

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

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?

Factor the polynomial. b^2 + 4b + 4