Whats the range?
12,15,8,29,30, 27,19,12

22

Step-by-step explanation:

first you have to order all of the numbers from least to greatest.

8,12,12,15,19,27,29,30

then you take the smallest value and subtract it from the largest.

30-8=22

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

correct answer:

b.(19,-2)