The first step would be to add 40 to both sides of the equation, you can use multiple methods to solve from there, but I recommend 'completing the square' since your b value is equal to zero :)
-3isqrt11!!! (The last answer!!)
To get the answer you would divide 104.56 by 8 and the answer would be $13.07. Therefore James would make $13.07 per hour
Well 10% is $6.50, so just multiple that by 2 and you get your fill tip of $13. Then you just add them together and you get $78.
