The two expressions are equivalent because they have the same value regardless of the number of substituted in for y
When adding fractions you need to get common denominators then you multiply too times bottom and then boom add and there you go
Exactly one activity:
246None of the activities :
1At least one activity:
74Snowboarding and Ice skating but not skiing:
5Snowboarding or ice skating but not skiing:
132.
Only skiing :
119.
The diagram is in the attachment.
