Auniversal set contains only sets a and b. if a∩b = ø and a and b are not the empty set, then all of the following are true except
a. a and b are disjoint.
b. a is equal to b complement.
c. a∪b={}
d. a is not a subset of b.

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Tcan be concluded that % of the seniors would prefer to see more candid pictures in this year's edition of the yearbook.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'