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 and b are disjoint.
a is equal to b complement.
a∪b={}
a is not a subset of b.

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?

Select the correct answer. what is the exact value of sin (157.5°)? a. 'sqrt(2 - sqrt(2))/2 b. *"-"'sqrt(2 + sqrt(2))/29 c.'sqrt(2 + sqrt(2))/4" d. "-"sqrt(2 + sqrt(2))/4)