Answer:
A sample of 801 is needed.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the z-score that has a p-value of .
The margin of error is of:
95% confidence level
So , z is the value of Z that has a p-value of , so .
25% of U.S. homes have a direct satellite television receiver.
This means that
How large a sample is necessary to estimate the true population of homes which do with 95% confidence and within 3 percentage points?
This is n for which M = 0.03. So
Rounding up:
A sample of 801 is needed.
The product of the values -2/7 and -3/4 is 3/14
- Cassie's fraction =
- Amy's fraction =
<u>The multiplication expression which relates Cassie's fraction with Amy's can be written thus</u> :
- Cassie's fraction × Amy's fraction
- The negative cancels out after multiplying both values.
Therefore, the multiplication result of the two fractional values is
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So the first thing you have to do is look at the input and output values and find the pattern. This is probably the hardest part. So 32-12=20 and 14-12=2 so we found the pattern all you have to do is find whats missing. So we have a blank and then a 14, all you do is add 12 to the 14 to find the input so the input for that would be 26 and now to find the other missing term you subtract 12 and that gives you -22. I hoped that helped.
Answer:
The correct answer is c. 13/3
Step-by-step explanation:
In order to find this, we put -2/3 in for each x that we see and evaluate.
f(x) = 3x^2 - 6x - 1
f(-2/3) = 3(-2/3)^2 - 6(-2/3) - 1
f(-2/3) = 3(4/9) + 4 - 1
f(-2/3) = 4/3 + 3
f(-2/3) = 13/3
-x^2y^2 + x^4 + 4y^2 - 4x^2
Separate into two parts to make simplification easier. Find the GCF of the values in each part.
-x^2 (y^2 - x^2) + 4 (y^2 - x^2)
Combine the factors and because the two in parenthesis are equal, eliminate one.
(-x^2 + 4) (y^2 - x^2)
Hope this helps!