Answer:71
Step-by-step explanation:
Option C:
The value of m is 4.
Solution:
Given data:
AB = 4m – 15
BC = 5m –6
AC = 15
<u>To find the value of m:</u>
Using segment addition postulate,
AB + BC = AC
4m – 15 + 5m –6 = 15
Arrange the like terms together.
4m + 5m – 15 – 6 = 15
9m – 21 = 15
Add 21 on both sides of the equation,
9m = 36
Divide by 9 on both sides of the equation.
m = 4
The value of m is 4.
Option C is the correct answer.
Answer: 121 mph
Step-by-step explanation: First, I did 6 x 7, and I got 42. Then I did 42 + 79, and I got 121 mph as my answer.
Answer: 
Work Shown:
I'm assuming your teacher wants you to factor as much as possible.

In the last step, I used the rule that 
We cannot factor any further. If the first term was
instead of
, then we could use the difference of squares factoring rule.