I believe that the best answer among the choices provided by the question is the second choice, <span>2.f^-1(3) when f(x)=2x+3/5</span>
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
Answer:
Step-by-step explanation:
S=saving
X=amount left
S-55=x
Another way : x=s-55
Unsure of what you mean by "reference number."
I do recognize that 11pi/9 is in quadrant III. I suspect that the so-called "reference number" is the acute angle between the end ray of 11pi/9 and pi, or, in more easily comparable numbers, between 9pi/9 and 11pi/9.
That difference is 2pi/9.
