What is the value of x ?

∠1 and ∠2 are complementary. ∠1=x°∠2=(3x+30)° select from the drop down menu to correctly answer the question. what is the value of x? . a.15 b.25 c.30 d.40 e.55

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

What is the 12th term of b(n)=-4-2(n-1)