Im having to write this problem as a equation then solvethe sum of 4xs a number and 9 is equal to3xs the number, im having to write this as a equation using x as the variable

Ben wants to play a carnival game that costs $2. in his pocket he has 5 red tickets worth 35 cents each, and 15 blue tickets worth 10 cents each. which of the following systems of inequalities correctly represents the constraints on the variables in this problem? let represent the red tickets and b represent the blue tickets.

Witch represents the inverse of the function f(x)=1/4x-12

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12