Answer:
answer d is the right answer
The third one: No, yes, no
The answer is 132. 132 is the original price. 80$ x 65% = 52. 80 + 52 = 132. So 132 is answer and original price.
The sum its +2
2+2=4
4+2=6
6+2=8
8+2=10
And so on the numbers just keep sum for 2
F(-1)=2
F(2)=-1
F(3)=-3
The f(x) part is the input and the stuff after is the output