Answer: 2x-3=15
2(9)-3=15
18-3=15
Answer:

Given:

Step-by-step explanation:
Property used: <em>An exterior angle of a triangle is equal to the sum of the opposite int</em><em>e</em><em>rior angles.</em>
<em>
</em>
Answer:
The null hypothesis 
The alternative hypothesis 
Step-by-step explanation:
From the question we are told that
The population mean is 
Generally
The null hypothesis is that the company's new sedan, the Libra, will have an average of 
This mathematically represented as
The null hypothesis 
The alternative hypothesis is that the company's new sedan, the Libra, will have an average better than 
This mathematically represented as
The alternative hypothesis 
Answer:
B. 66
Step-by-step explanation:
Substitute x = 3
Multiply in the parentheses
(6 + 192) Add
(198) Multiply
66