Using the given points and line, determine the slope of the line.
(1, 2) and (2, 1)

Perform the indicated operation. 8/a - 6/a + 7/a

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?

Using elimination, what is -4x+2y=-12 4x+8y=-24