so im doing algebra and we are doing adding and subracting polynomials and i really need help and there are 3 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

Which math sentence can be used to determine if the triangle is a right triangle?

What is the reflection image of (5,-3) across the line y = -x?