HELP PLEASE !
10 points !!

What is the slope of the function?

The sum of two numbers is 86, and their difference is 20. find the two numbers

Solve the system of equations y= 3/2 - 1, -x+ y =-3

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?