Hey i need help so if 3xb=92 what i b

Solve 3x-18=2y and 5x-6y=6 by elimination show work

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?

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?