Answer:
A) 99.7% of people have an IQ between 64 and 136.
B) 5% of people have an IQ score less than 76 or greater than 124.
C) 16% of people have an IQ score greater than 112.
Step-by-step explanation:
The Empirical Rule tells us that, in a normal or 'bell-shaped' distribution, 68% of the data is one standard deviation from the mean, 95% of the data is two standard deviations from the mean, and 99.7% of the data is three standard deviations from the mean.
A) 64 and 136 are 3 standard deviations away from the mean, so 99.7% of people have an IQ between 64 and 136.
B) 76 and 124 are 2 standard devations away from the mean, but the answer is asking what percentage is not between them. 100% - 95% gives us 5%.
C) 112 is one standard deviation away from the mean. If we want to find the percentage greater, then we can do 100% - 50% (as 112 is to the left of the mean), then we can take half of 68 to get 34%, and after subtracting 50% and 34% from the 100%, we get 16%.
Answer:
-1.5/2
Step-by-step explanation:
X=y+700
X is larger acct
Y is smaller acct
Larger acct equals amount in smaller account plus $700.
<span>B. 18.6x
D. 18.1x
A. 18.3x
Tell me if i'm wrong</span>
Answer:
No, no it is not.
Step-by-step explanation:
First step : Solve for y in − 2 x + y = − 7.
y = 2 x − 7
Second step : Substitute y = 2 x - 7 into 3 x + 2 y = 10.
7 x − 14 = 10
Solve for x in 7 x - 14 = 10.
x = 24 / 7
Substitute x = 24 / 7 into y = 2 x - 7.
- 1 / 7
That means your answer is.
x = 24 / 7
y = − 1 / 7
