Find (tan a+b) if a and b are in quadrant 2 with tan a=(1/3) and sin b=(20/29)

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.