Roberto invested a total of $1, part at 6% and part at 9% . how much did he invest in the higher interest account if the total interest earned in one year was $810?

Which expression is equivalent to? assume x > 0 and y > 0.

How do you find principle and simple interest

This stem-and-leaf plot represents the heights of the students on ralph's basketball team. one student's height is missing from the plot. if the mean height of all the students on the team is 61 inches, what is the missing height? a. 55 in. b. 59 in. c. 61 in. d. 65 in.