Answer:
mode
Step-by-step explanation:
6 = -2(x+5)
6 = -2x -10
6 + 10 = -2x
16 = -2x
x = 16/-2
x = -8
C. quarts
2:3 boy:teacher 8:12
4:5 teacher:girl 12:15
8:12:15 boy:teacher:girl