Answer:
2t+2u+2v+4w
Step-by-step explanation:
Add up all of the terms
A and B must be disjoint. You have, by the inclusion/exclusion principle, that
where the last term is required to prevent double counting. When
and
are disjoint, you have
and
, leaving you with
Answer:
11 hours babysitting
7 hours music lesson
Step-by-step explanation:
(11*5) + (7*12) = 139