Answer:
d) 1
Step-by-step explanation:
The variance of standard normal distribution is simply put as 1.
If you take it a bit further, even though not asked, the mean of a standard normal distribution is 0.
Therefore, the conclusion is that, the variance of a standard normal distribution is 1, while the mean of the same standard normal distribution is 0
Answer:
w(w² + 3)
Step-by-step explanation:
Given the expression
w³ + 3w
Since w is common to the terms w³ and 3w, we will factor it out from the expression as shown;
w³ + 3w
w(w²)+ 3(w)
w(w² + 3)
This gives the required expression
Answer:
the height is 32cm
Step-by-step explanation:
The hard part is just making sense of what they are asking for.
4 times the quantity of a number decreased by one is just the expression:
4 * (x-1)
Where "x" is our mystery number.
Two more than the same number is just:
x + 2
Where "x" is our same mystery number.
They say that these two expressions are the same, so just set them equal to each other.
4*(x-1) = x+2
4x - 4 = x +2
3x -4 = 2
3x = 6
x = 2
The mystery number is 2. Plug in 2 and you will see that it works!
