Answer:
√2
Step-by-step explanation:
As a fraction, 2 is 2/1
Oh no, there is always an odd exponent. So it could not have been made by squaring a rational number! This means that the value that was squared to make 2 (ie the square root of 2) cannot be a rational number. In other words, the square root of 2 is irrational.
Answer:
Yes
Step-by-step explanation:
To see is (-1, -1) is a solution to the system, we can plug it into the system to check:
-1 = -8(-1)-9
-1 = 8-9
-1 = -1
-1 = -5(-1)-6
-1 = 5-6
-1 = -1
Both of the equations are true, therefore (-1, -1) is a solution to the system.
a. Expectation is linear, so that
The variance of a sum of independent random variables is equal to a weighted sum of the variances, with weights equal to the squares of the coefficients of the :
b. If the were dependent on one another, we would have the same expectation, but now the variance of a sum of random variables becomes the sum of their covariances:
where
When we assumed independence, we were granted , but this may not be the case if the variables are dependent.
Answer: She should us a ratio of 1:5 for grapes to blueberries
Step-by-step explanation:
Blueberries are a lot smaller than a typical grape, hence you should have 5 blueberries for every grape. Hence, the 1:5 ratio.