This is urgent please help and no links

Describe the relationship between the angles of similar triangles and the sides of similar triangles

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)