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allochka39001 [22]
3 years ago
10

Combine like terms. Please help me.

Mathematics
1 answer:
My name is Ann [436]3 years ago
3 0

Answer:

15y^2-45

Step-by-step explanation:

5y^2+10y^2-45 = 15y^2-45

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A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standa
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All our answers lie in the above statement.

Confidence Level:
The creator claims that 9 out 10 students will have the average score in the said range. Or in other words we can say that the creator is 90% confident about the result of the field test. So the confidence level is 90%. 

Margin of Error:
The average score lies within 4% of 70%. This means the margin of error is 4% i.e. the average scores can deviate from 70% by 4% .

Confidence Interval:
Lower Limit = 70% - 4% = 66%
Upper Limit = 70% + 4% = 74%

Interpretation:
The exam creator is 90% confident that the average scores of seniors will be between 66% and 74%. 
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Is the result of Double 5 and add 1 the same as the result of Add 1 to 5; then double the result?
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Step-by-step explanation:

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answer:

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