10 POINTS AND BRAINLIEST Suppose your friend says he can solve the equation 15-2x+6=127x-4 by first using the Multiplication Property of Equality to multiply each side of the equation by 2. Is he correct? Justify your response.

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?