Question

Mr. Wilson's class took an exam consisting of multiple choice and fill-in-the-blank questions. It takes Katie 2 minutes to answer a multiple choice question and 4 minutes to answer a fill-in-the-blank question. Katie finished the exam in 140 minutes. It takes Robert 4 minutes to answer a multiple choice question and 6 minutes to answer a fill-in-the-blank question. Robert finished the exam in 230 minutes. Which system of equations below can be used to determine the number of multiple choice and fill-in-the-blank questions that were on the exam?

(Let x represent the number of multiple choice questions and y represent the number of fill-in-the-blank questions.)

2x + 4y = 230
4x + 6y = 140

6x + 4y = 230
4x + 2y = 140

2x + 4x = 140
4y + 6y = 230

2x + 4y = 140
4x + 6y = 230

Answer 1

it is the last choice

Answer 2

Same as the last one, remove all the answers that do not go with what the text said and check it by seeing if the "right" answer has all the correct cues

So to sum it up:

Katie took 2 min. per multiple choice and 4 per fill in for a total of 140 minutes

Robert took 4 min per multiple choice and 6 per fill in for a total of 230 minutes

Answer 3

In the end it's about taking only the important things from the question and putting them into a formula.