Can someone help me with these questions?

Write each expression in exponential form and find its value.| ! 2 x 2 x 2 x 2

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

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.