Hi, will ya'll please help me..?

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).