Helpppl please answer these two questions

Each morning papa notes the birds feeding on his bird feeder. so far this month he has see. 59 blue jays, 68 black crows, 12 red robin's and 1 cardinal. what is the probability of a blue jay being the next bird papa sees

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42