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Jack2019
27.07.2019 •
Mathematics
Atest has 19 questions worth a total 100 points. there are ten-point questions and four-point questions. how many questions of each kind?
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Ответ:
4 points: 15 questions: 4*15=60
60+40=100
hope it helps
Ответ:
10x + 4y = 100
This is a systems of equations.
Isolate x from the first equation:
x = 19 - y
Now, plug it into the second:
10(19 - y) + 4y = 100
190 - 10y + 4y = 100
-6y + 190 = 100
-6y = -90
y = 15
Plug y in and solve for x:
10x + 4(15) = 100
10x + 60 = 100
10x = 40
x = 4
There are four 10-point questions and fifteen 4-point questions.
Ответ:
x-intercepts-(7,0) (3,0)
y-intercepts-(0,315)
Step-by-step explanation: