56 is you answer you need.
Answer:
x=3 y=1
Step-by-step explanation:
-x-y=1
y=-x+4
x=-y-1
x=-y+4
x=-1+4
<u>x=3</u>
y=-3+4
<u>y=1</u>
14x0.75=10.5
15-10.5=4.5
so she will get $4.50c
Hope this helps! :D
Answer:

Step-by-step explanation:
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
The population proportion have the following distribution
And we can solve the problem using the z score on this case given by:

We are interested on this probability:

And we can use the z score formula, and we got this:


And we can find this probability like this:
