Please help, would be grateful :)

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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?