Randee invested $1000 for college in an account earning 5% simple interest. when she withdrew the investment she had earned a total of $550 in interest. how log was the money invested?

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

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?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.