Answer with Step-by-step explanation:
We have to prove that
is true for all sets A and B
Let 
Then
or 
and
or 
Hence,
Conversely ,Let 
Then x belongs to A and x does not belongs to B then
x belongs to A- B
Or x belongs to A and x belongs to B then x belongs to 
Hence, 
Therefore, 
Answer:
She spent $26.50
Step-by-step explanation:
subtract $18.50 from $45.00
Is there a equation? Or do you just wanna know what the sum of two binomials equal?
Answer: 6. d
7. b
8. d
9. c
Step-by-step explanation: