Let

denote the random variable representing a given number in the total set of numbers. We're told that

of the numbers fall within a given range, so we know

where

is normally distributed with mean 45 and an unknown variance

.
Let's make the transformation to a random variable with a standard normal distribution:

Since

is symmetric, we have

The mean of

is 0, and by symmetry we know that exactly half of the distribution falls to the left of

, so

. We're left with


This probability corresponds to a value of

, which means
Answer:
y=5x=15
Step-by-step explanation:
y-5=5(x--2)
y-5=5x+10
y=5x+15
Answer:
80%
Step-by-step explanation:
Was this the answer you were looking for??
Answer:
The answer is 3(2x + 3)
Step-by-step explanation:
6(3x + 3) - 3(4x – 2)
Multiply (3x + 3) by 6 and (4x – 2) by (-3) we get,
6 (3x + 3) = 18x + 3
(-3) (4x – 2) = -12x + 6
Now, Simply
18x + 3 – 12x + 6
6x + 9 = 3(2x + 3)
Thus, The answer is 3(2x + 3)
<u>-TheUnknownScientist 72</u>
33cm
Because add all of them then subtract then do the parenthasees and you get 33