Answer:
B
Step-by-step explanation:
Variance can be said to be a measure of dispersion for a random sample.
Variance = pq/n
When given the variance, we can find the standard deviation.
Standard deviation = √variance
= √pq/n
We estimate that 25/75 = 1/3 of the fish in the pond are marked.
So an estimate would be 30 / 1/3 = 30*3
= 90 answer
Answer:
7/15
Step-by-step explanation:
2 1/7 is mixed fraction, if you turn it into a improper fraction, you will get 15/7. Just flip those two numbers, and you get the answer
Answer:
This is because exponents increase a number, for example 
<em>squaring a number is basically multiplying it by itself.</em> So 
. Now obiviously 4 is greater than 2. But lets make the numbers like this:
And again, 
Now, which is bigger 
A quarter is smaller than a half right?
So in this case we can see that fractions raised to an exponent get smaller while numbers raised to an exponent get bigger.
Answer:
Infintely many solutions
Step-by-step explanation:
I'm going to assume that the capital y is equal to the lowerase y
if you subtract y and two from both sides in the second equation you get
-y=2x-2
you then divide by -1 to get it into a normal form
y= -2x+2
this is the same as the first equation, these lines are the same
