What sentence represents the number of test questions in the problem below? a test is worth 80 points. multiple-choice questions are worth 2 points, and short-answer questions are worth 4 points. if the test has 25 questions, how many multiple-choice questions are there?

The first thing we must do for this case is to define variables.
 We have then:
 x = Multiple-choice questions
 y = short-answer questions
 We write the following system of equations:
 2x + 4y = 80
 x + y = 25
 Solving the system of equations we have:
 x = 10
 y = 15
 
 there are 10 multiple-choice questions

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