This is showing a corresponding pair of angles. So x would equal 34 degrees. (If it was a linear pair, it would be 180-34)
Answer: The correct option is (C) 
Step-by-step explanation: We are given to choose the correct simplification for the following expression :

We will be using the following property of exponents :

So, the simplification of expression (i) is as follows :

Thus, the correct simplification of the given expression is 
Option (C) is CORRECT.
Answer:
Step-by-step explanation:
∠BCA=∠CAE (alternate angles)
∠CAE=x
41+102+∠BCA=180
∠BCA=180-143=37
so x=37°
N x 721 = 72.1
721n = 72.1 (put it in an easier format)
n = 0.1 (divide both sides by 721)
0.074 x n = 74
0.074n = 74 (put it in an easier format)
n = 1000 (divide both sides by 0.074)