Mary puts 3 red marbles, 3 blue marbles, 4 green marbles, and 10 yellow marbles into a bag. Mary then picks one marble out of the bag. What is the probability of picking a yellow marble?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Can any one me with the answers to these questions asap?