Answer:
A
Step-by-step explanation:
Isabella started with 10 points. We know that the first value of this will be 10. Then, she loses 20 points. This is represented with -20. Finally, she wins 45 points, which is shown by writing +45.
10 - 20 + 45
:)
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Answer:
8500
Step-by-step explanation:
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Answer:
2x=0
x=0
Step-by-step explanation:
11-3x=5(2-x)+1
We first distribute the 5 to 2 and -x:
11-3x=10-5x+1
Combine like terms (combine all variables and then combine all constants)
-3x+5x=10+1-11
2x=0
x=0
Answer:
a) The 90% confidence interval is
b) The margin of error is 0.063.
Step-by-step explanation:
We have to construct a 90% confidence interval for the proportion of students enrolled in college or a trade school within 12 months of graduating from high school in 2013.
We have a sample of 160 students, and a proportion of:
The standard deviation is:
As the sample size is big enough, we use the z-value as statistic. For a 90% CI, the z-value is z=1.645.
Then, the margin of error is:
Then, the 90% confidence interval is: