Which of these is the algebraic expression for "3 times the sum of 2 and y?"
2 answers:
You might be interested in
<h2>QUESTION</h2>
What is 33% of 400?
<h2>ANSWER AND EXPLANATION</h2>To find the percent of a number, you have to change the percent into a decimal or a fraction and multiply by the number.
<h3>DECIMAL</h3>To change a percent into a decimal, remove the percent sign and move the decimal point 2 places to the left.
Now that you have your decimal, multiply by 400:
ANSWER = 132
<h3>FRACTION</h3>To change a percent into a fraction, make the percent number as the numerator(top number) and 100 as the denominator(bottom number) since fractions are out of 100.
Now that you have your fraction, multiply by 400:
ANSWER = 132
<em>If you have any questions, feel free to ask in the comments! :)</em>
Answer:
Step-by-step explanation:
The confidence interval for population mean is given by :-
Given : Sample size : , which is a large sample , so we apply z-test .
Sample mean :
Standard deviation :
Significance level :
Critical value :
Now, a confidence interval at the 95% level of confidence will be :-