Please help me question (c)
I will mark you as brainliest answer
show step by step answer​

Which is the value of this expression when p=(-2) and q=(-1)

Find the solution of this system of equation -7x+y=-20 9x-3y=36

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?