Answer:
The third option.
Step-by-step explanation:
Hope this helps!
2 and the last one I think is the answer
Answer:
As the angles are supplementary, their sum is 180
123 + 3x = 180
3x = 57
x = 19
The answer is A for that problem
Since there is an expression in the square root, it must be non-negative. So:

Then, the interval is: