1/5 (0.2)
0.49
0.5
Hope this helped!! xx
x equals negative 8 and negative 4
Using the normal distribution, it is found that 1851 people would have an IQ less than 115.
<h3>Normal Probability Distribution</h3>
The z-score of a measure X of a normally distributed variable with mean
and standard deviation
is given by:

- The z-score measures how many standard deviations the measure is above or below the mean.
- Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
The mean and the standard deviation are given, respectively, by:

The proportion of IQ scores less than 115 is the <u>p-value of Z when X = 115</u>, hence:


Z = 1
Z = 1 has a p-value of 0.8413.
Out of 2200 people:
0.8413 x 2200 = 1851.
More can be learned about the normal distribution at brainly.com/question/27643290
#SPJ1
Olivia applied the scale factor to the measurements of the model she saw. We need to know those in order to calculate the new ones.
-12x - 9 = -6y
-12x + 6y -9 = 0
-12x + 6y = 9 is the answer