Let's assume there are juniors, seniors, and graduate students in your class and we want to know if their average GPAs differ. What is the proper statistical test?

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64

idk

step-by-step explanation:

8(1/6)

step-by-step explain:

49/6= 48

8 (1/6)