The angle of depression from the top of a 130-foot lighthouse to a buoy is 31˚. How far is the buoy from the lighthouse?

What are the solutions to the equation 4x2+3x=24-x

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?

3x + 4y = 5 x- 3y = -7 solve by substitution