IdkHowToDoMath
06.08.2021 •
Mathematics
A test is worth 30 points. Multiple-choice questions are worth 2 point and short-answer questions are worth 3 points. If the test has 13 questions, how many multiple-choice questions are there?
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Ответ:
Equations:
2x + 3y = 30
x + y = 13
Plug them in:
2(9) + 3(4) = 30
9 + 4 = 13
Ответ:
2x9=18, 3x4=12, 12+18=30 points, 9+4=13 questions
Ответ: