rose3358
28.01.2020 •
Mathematics
Mrs.morales wrote a test with 15 questions covering spelling and vocabulary.spelling questions(x)are worth 5 points and vocabulary questions (y) are worth 10 points. the maximum number of points possible on the test is 100.
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Ответ:
5x + 10y = 100
5(15 - y) + 10y = 100
75 - 5y + 10y = 100
-5y + 10y = 100 - 75
5y = 25
y = 25/5
y = 5there were 5 vocabulary questions
x + y = 15
x + 5 = 15
x = 15 - 5
x = 10there were 10 spelling questions
Ответ:
B) measures of variability
Hope this helped :)