(-8+13i)+(25-4i) write in standard form

Ineed asap.i cant understand this question i need someone to me right away

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

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42