1. A student took 60 minutes to answer a combination of 20 multiple-choice and extended-response questions. She took 2 minutes to answer each multiple-choice question and 6 minutes to answer each extended-response question. a. Write a system of equations in two variables to model the relationship between the number of multiple-choice questions (m) and the number of extended-response questions (r). b. How many of each type of question was on the test? Show your work to solve the system.