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Sever21 [200]
3 years ago
15

3. An ELA test is worth 100 points. There are a total of 26 questions. They are spelling word questions that are worth 2 points

each and vocabulary word questions worth 5 points each. How many of each type of question are there? *
Mathematics
1 answer:
zysi [14]3 years ago
7 0

Answer:

There are 10 two point questions and 16 five point questions.

Step-by-step explanation:

  1. x = the number of 2 points questions
  2. y = the number of 5 points questions
  3. x + y = 26
  4. 2x + 5y = 100
  5. x = 10 two points questions
  6. y = 16 five points questions
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The junior high basketball team played 3 games in a week and averaged 49 points per game that week. In the first game they score
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A publisher reports that 45% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is
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Answer:

z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933  

p_v =2*P(z  

Step-by-step explanation:

Information given

n=370 represent the sample selected

\hat p=0.4 estimated proportion of  readers owned a laptop

p_o=0.45 is the value that we want to test

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Creating the hypothesis

We need to conduct a hypothesis in order to test if the true proportion of readers owned a laptop is different from 0.45, the system of hypothesis are:  

Null hypothesis:p=0.45  

Alternative hypothesis:p \neq 0.45  

The statistic is:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

Replacing we got:

z=\frac{0.40 -0.45}{\sqrt{\frac{0.45(1-0.45)}{370}}}=-1.933  

Calculating the p value  

We have a bilateral test so then the p value would be:

p_v =2*P(z  

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