Answer:
c) .22
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
In this question:
Then
Answer:
7. A- 5√2
9. C- 6√2
Step-by-step explanation:
Let's begin with question 7 asking to simplify √50.
We need to ask ourselves the question if 50 has a factor that is a square. It does!
We can break √50 into √25·2. Since 25 is a square, we can take it out of the radical by taking out its square root like this:
5√2.
For question 9, we can simply do the same exact process. √72 can be broken into a factor that is a perfect square as well!
√72 --> √36·2
Now, take the square root of 36 out of the radical to become:
6√2
Here are your answers!
Answer:
x = -2
Step-by-step explanation:
3x-1 = 8(x+1)+1
3x-1 = 8x+8+1
3x-1 = 8x+9
-3x -3x
-1 = 5x+9
-9 -9
-10 = 5x
/5 /5
-2 = x
Answer:im sorry this is very confusing
Step-by-step explanation: