Charles asked his teammates how many hours they practiced swimming during the week. He recorded his data in the
table below and used the shaded columns to calculate three sample means. What is the range of the values for the
sample means?
14
I 8
16 T 2
I 5
Hours of Swim Practice
5
3
6
3 5 4
4 T 5
2
3
4
T
NNW
All
O2
O 3.75
O 4.75

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

i get you, what you should do is think of the positive things that would come out of it. it will make yours parents proud and raise your grade. you should always try and if you can't focus tell the teacher.