Asap which expression can be used to find 45% of 54? a.4/5 x 54 b.5/4 x 54 c. 9? 20 x 54 d. 20/9 x 54

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

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia

It says factor each expression 49x-28?