Answer: 4+87x
Step-by-step explanation:
4+35+52
Combine like terms
4+35x+52x
4+87x
rearrange terms
=4+87x
3a) The figure has 5 sides and 5 vertices
3b) None of the sides are congruent, so the figure is not are guitar polygon
Answer:

Step-by-step explanation:
Notice from the attached image that -315 degrees is the same as 45 degrees.
Recall as well that the csc function is defined as the reciprocal of the sine function: 
Then, you need to evaluate 
Always will be your answer ;D