Answer:
Step-by-step explanation: 1/2x=16
16x4=64, Although this is not exactly 55 cookies, you can either make more or less. So you need 4 salt, to make 55.
Answer: Choice B (If you need to do questions like this in the future i recommend using the desmos graphing calculator online, inputting the equations and comparing them)
It would be $54.00..........................