The Venn diagram shows the number of students playing instruments. How many students play both the guitar and tuba?

A)7

B)8

C)15

D)64

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.