There are 10 members on a debating team. In how many ways can a team of four debaters be selected for competition if the captain of the team must be one of the speakers and the order of the speakers is to be a factor.

X+ y = 5 ; x - y =3 solve using linear combination

Is the figure congruent? yes or no?

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655