Answer:
Explanation below.
Step-by-step explanation:
1. a. 
b. 
c. x=144
2. a. 
b. x= 14
3.

4.

Answer:
the numbers 20, 60, 80, and 120 go on the x axis
the numbers, 3, 9, 12, and 18 go on the y axis
so you go to 20 on the bottom and go up to number 3
60 go up to number 9
80 go up to number 12
120 go up to number 18
Step-by-step explanation:
Answer:
at least 6
Step-by-step explanation:
3(.5x+3)>12
1.5x+9>12
1.5>9
x>6
Answer:

Step-by-step explanation:
H0: µ1 – µ2 = 0
HA: µ1 – µ2 ≠ 0
We have given,
The population variances are not known and cannot be assumed equal.
The test statistic for the test is

Where,
= sample meaan of population 1
= sample mean of population 2
= sample size of population 1
= sample size of population 2
Therefore, this is the test
