She has distributed the bracket incorrectly
(64 + 5) - 0.2(- 20 + 10)
=
(69) - 0.2 (- 10)
=34.5 + 2
= 36.5
The intersection of two sets A and B is defined as the set composed by the elements appearing in both A and B.
So, the intersection is

Because all the other numbers do not belong to both sets:
- 2, 3 and 7 belong to A alone
- 13, 15 and 17 belong to B alone
- 5 and 11 belong to both A and B
Answer:
-3/5
Step-by-step explanation:
I don’t know, I forgot how to solve problems like this, look it up
Since the number before the number in the tenth place (7) is greater than 5 (8), you will be rounding up. So your answer is 9.80