What is the solution of the system of equations? {3x−1/-2y=−7/-2x+2y=1 Enter your answer in the boxes.
1 answer:
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Mean is and a standard deviation is
, then the variable
.
Use substitution
.
This substitution gives you that .
a. For X=130, and
(the decimal value is taken from the Standard Normal Distribution Table).
b. For X=90, and for X=110,
. Then
(the decimal value is taken from the Standard Normal Distribution Table).