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elena-14-01-66 [18.8K]
3 years ago
14

Helpppp with the first & second !!!!!

Mathematics
1 answer:
Shtirlitz [24]3 years ago
3 0

Answer:

The first one is a.x= - 10

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A graduate student wanted to estimate the average time spent studying among graduate students at her school. She randomly sample
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Answer:

B. The width of the confidence interval would be smaller.

Step-by-step explanation:

By reducing the confidence level from 99% to 95%, the student assumes that there is more uncertainty about the new confidence interval than the previous one. That, being said, since the results aren't as certain, the confidence interval is widened towards a central average point because the new interval isn't as accurate.

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Is 2/3 equivalent to 5/6
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How many numbers are from k to n? (Including k and n.)
shepuryov [24]

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<em>n</em> - <em>k</em> + 1

Step-by-step explanation:

This is assuming (because you did not say) that <em>n</em> and <em>k</em> are integers and <em>n</em> is greater than <em>k</em>.

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3 years ago
Mark wants to improve his free throw percentage in basketball He has shot 1,250 free throws over the last 20 days. He shot eithe
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Let's use a for number of days when he shot 50 shots and b for number of days when he shot 100 shots.
We have:
a + b = 20

We also know that he shot total of 1250 shots:
50a + 100 b = 1250

We have two equations. We can solve them for a and b.  Let's rearange first equation for a:
a= 20 - b
We insert this into second equation:
50 * (20 - b ) + 100b = 1250
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a = 20 - 5
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Mark shot 100 shots on 5 days.
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i think it's B, no solutions

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because they are parallel to each other

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2 years ago
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