If 500 high school students, 376 said they would prefer to have computers in every classroom then the confidence interval at 95% is (71.41%,78.99%) Since option (a) is correct.
Given x= 376, n = 500
The (71.41%,78.99%)

Critical values
Using the z-table the z-critical value at the given significance level at α=0.05 is,
Construct a 95% confidence interval
That is,



= (71.41%,78.99%)
Learn more about confidence intervals here: brainly.com/question/15712887
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2/3 is .666666 so that would be the percent
Answer:
x=-2
Step-by-step explanation:
Combine like terms:
10- 2x - 7 - 8x = 5
10-(-7)=<u>10+7</u>=17
<u>2x-8x</u>=-6x
17-6x=5
-17 -17
6x=-12
÷6 ÷6
x=-2
The answer is 56! How you do this, is you take 80, and you multiply it by 7. Then you divide that answer by 10. Then you have your answer! I’m really bad at math but I do know how to do that!