Answer:
B. 40
Step-by-step explanation:
We know that the large angle is 90 degrees as it is a right angle. Thus, 
(I don't know how to include degree symbols). We solve: 
, so then 
. Thus, x is forty degrees and the answer is B.
15) perpendicular
16) parallel
Answer:True: 8+x+(-5) = (-4) +x+7
Step-by-step explanation:
1st Step
Remove parenthesis:
8 + x + -5 = -4 + x + 7,
2nd Step
Subtract or Cancel X from both sides:
3rd Step
Simplify
8 - 5 = -4 + 7
3 = 3
All you have to do is plug m and n into the equation:
n+6m
Since n=7, you'll get:
7+6m
And since m=8, you'll get:
7+6(8)
And by doing the order of operations (PEMDAS), you'll start off multiplying 6 and 8, which is 48, then add 7, which is 55.
Your answer should be 55!
