A student is taking a multiple-choice test that has 80 questions. Each question has 5 answer choices. If the student guesses randomly on every question, how many questions should the student expect to
answer correctly?

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.