Answer:
tip=48.28
total cost =316.49
Step-by-step explanation:
tip = 48.28
Total + tip= 316.49
7.91 = 8 21.9 = 22
8 + 22 = 30
So you have x, then you square it to get x^2, then you minus 2x, then +3
The inverse is going backwards so you -3 then +2x then square root x
So you get square root x + 2x -3
I'm pretty sure this is right, sorry if I'm wrong.