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Veseljchak [2.6K]
2 years ago
6

A science test, which is worth 100 points, consist of 24 questions. Each question is worth either 3 points or 5 points. If X is

the number of 3 point questions and why is the number of 5 point questions, the system shown represents this situation. X+y=24, 3x+5y=100. What does the solution of this system indicate about the questions on the test?
Mathematics
1 answer:
Elis [28]2 years ago
6 0

Answer:

x= 10 y=14 : 10 3 point, 14 5 point

Step-by-step explanation:

Write your equation down vertically,

3x + 5y = 100

 x + y   =  24

Next find multiply bottom equation by one number from the tops opposite,

3x + 5y = 100

(-3)x +(-3)y = (-3)24

3x + 5y = 100

-3x - 3y= -72

Add the two functions to isolate y

2y= 28 y=14

Plug y back into original and solve

3x +5(14) =100 --> 3x + 70 =100 --> 3x = 30 x=10

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f(t)=h=-16t^2+20t+6



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h=-\frac{25}{4}+\frac{50}{4}+6=\frac{-25+50+24}{4}=\frac{49}{4}

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t=\frac{-20-28}{-32}=\frac{-48}{-32}=\frac{3}{2}=1.5

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ans (-x+8=6)

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Answer/Step-by-step explanation:

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Example could be:

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Girls: 81
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Answer:

22

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