On a certain quiz with 25 questions, each correct answer is scored 4 points and each incorrect answer is scored –1 point. questions not answered receive no points. a student who answered 23 questions and had a total score of 82 points answered how many questions correctly? 18 19 20 21 22

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236