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hammonangelo25
20.09.2019 •
Mathematics
Your teacher is giving you a test worth 100 points containing 40 questions. there are two‐point and four‐point questions on the test. how many of each type of question are on the test?
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Ответ:
x + y = 40
2x + 4y = 100
Let's try 20 for x and 20 for y.
20 + 20 = 40
2(20) + 4(20) =40 + 80, nope.
Let's try 30 for x and 10 for y.
30 + 10 = 40
2(30) + 4(10) = 60 + 40, yes!
x (2 pt) = 30
y (4 pt) = 10
I hope this helps!
Ответ:
169.15 is the correct answer