A test is worth 50 points. Multiple-choice questions are worth 1 point, and short-answer questions are worth 3 points. If the test has

Question

A test is worth 50 points. Multiple-choice questions are worth 1 point, and
short-answer questions are worth 3 points. If the test has 20 questions, how
many multiple-choice questions are there?

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Jasmine 2 days 2021-10-11T14:42:42+00:00 2 Answers 0

Answers ( )

    0
    2021-10-11T14:44:03+00:00

    Answer:

    5 multiple choice questions

    Step-by-step explanation:

    Set 1 point questions to “x” and 3 point questions to “y”.

    You can form the equations:

    x + y = 20

    1x + 3y = 50

    Using substitution, you can rewrite the first equation to: “x = 20 – y” and plug it into the bottom equation.

    1(20-y) + 3y = 50, then open parenthesis and combine like terms

    2y = 30, then divide both sides by 2

    y = 15, there 20 total questions, and 15 short answer questions, so there are 5 multiple choice questions

    3*15+1*5 = 45 + 5 = 50

    0
    2021-10-11T14:44:13+00:00

    Answer:

    The answer is 2

    Step-by-step explanation:

    This is because 3 times 16 is 48, so add 2 more multiple choice questions and it equals 50. Hope this helps :p

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45:7+7-4:2-5:5*4+35:2 =? ( )