Evaluate 4.9; -6.5k when j = 7 and k = 2

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

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 cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).