54:63 in simplest form

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?

What is the domain of a function? a.) the set of all points on the function b.) the set of all first elements of the function c.) the set of all second elements of the function

Find the input (x) of the function y=-4/3x+20 if the output (y) is -80