Describe when it would be most beneficial to solve systems using graphing, substitution, and elimination. Also, describe when it might not be beneficial to use the methods. Give examples to strengthen and support your answer.

Write an inequality and solve each problem. for exercises 11 and 12, interpret the solution.

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?

The anwser cause i do not understand just plez