The question is attached below! Please respond with reasoning and working out :(

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?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10