Given the arithmetic sequence an = 4 + 8(n − 1), what is the domain for n?

∠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

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Opposite angles in a parrellelogram are