Melissa, Charlie, and Josh have a total of $90 in their wallets. Josh has 3 times what Charlie has. Melissa has $10 less than Charlie. How much does each have?

Find dy/dx using implicit differentiation ln(20+e^xy)=y

What percent of the circle below is shaded?

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