Answer:
sorry for my handwriting
i think this is the correct answer
By exterior angle of triangle:
17x+4+8x+1=80
x=3
Number 6 is not a reasonable answer so I agree
It doesn't have a formal name. However, since a fraction is division, you can call it a quotient.
Let's begin by listing out the information given to us:

We are to find the value of y