Isoceles and Equalateral Triangles. Need help fast

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

What is the prime factorization of 230

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.