Given:
Universal set = {a, b, c, d, e, f, g, h}
A = {a, b, c, d}
B = {a, d, e}
C= {c, f, g, h}
To find:
The elements of set B'.
Solution:
Let universal set be U.
U = {a, b, c, d, e, f, g, h}
We know that,
Compliment of a set = Universal set - Set
It means,



Therefore, only b, c, f, g, h are the elements of set B'.
Given:
In triangle
.
To find:
The measure of angle C.
Solution:
Law of Cosines:


Substituting the given values, we get




Taking cos inverse on both sides, we get


Therefore, the measure of angle C is 90 degrees.
If she reads 27 chapters in 9 hours then you would divide 27 and 9 then you would get three so she reads 3 chapters an hour
Step-by-step explanation:
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