Let a and b be subsets of r. (a) if x ∈ (a ∩ b)c, explain why x ∈ ac ∪ bc. this shows that (a ∩ b)c ⊆ ac ∪ bc. 12 chapter 1. the real numbers (b) prove the reverse inclusion (a ∩ b)c ⊇ ac ∪ bc, and conclude that (a ∩ b)c = ac ∪ bc. (c) show (a ∪ b)c = ac ∩ bc by demonstrating inclusion both ways.

answer is -3 just subtract 4 from each side

Step-by-step explanation:

B

Step-by-step explanation:

B ⊂ A

Hope it helps!

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°