Angle 3 is on a straight line to angle 2, which means that they add up to 180°. Therefore, 180 - 117 = 63° which is your answer. I hope this helps!
Answer:
A)29 and B) 21,
Step-by-step explanation:
First,in the sequence
, the parameter
must to be a integer.
Second, we need to solve the equations by
.

All the option in the problem represent an
Then, we need to prove all number in the options, if the result is a integer number, this option can be part of the sequence.
For A)

For B)

For C)

For D)

Only A) and B) only A and B meet the requirement
I think you can plus like 180 plus that or 180 minus butttt it’s bc the angle looks like a “C” so you plus
The area of the cross-section is 169 sq. cm.
That is the correct answer to this problem
a is given to us so just plug a into the first equation:
b-3 - 3b =9
Add 3 to both sides:
b-3b=12
Combine like terms:
-2b=12
Divide by -2 to get b by itself:
b=-6
The only answer with b as -6 is the first one, (-9,-6)