The answer is 70 because angle CGA is a 90° angle and it is split into two. so if one part of it is 20°. 90-20 equals 70°
Answer:

Step-by-step explanation:
The given radical expression is;

We multiply both the numerator and the denominator by the conjugate of
which is 

The denominator is now difference of two squares;

Simplify:




Answer:
=33
Step-by-step explanation:
As 27 will always be equal to 27, you can place whatever you want for x and y and the equation would still be satisfied, as it turns out that it doesn't depend on the x or y value.
Therefore, the system has infinite solutions.
Be safe!
Answer:
The first one and the last one
Step-by-step explanation: