Ireally need , how do you solve this?

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

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