Help needed immediately. :( this is my my third time posting and no one is helping

Ajar of gumballs contains 4 reds, 2 greens, and 6 blues. what is the probability of getting two blues in a row without replacement?

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?