Jenny has 45 tennis balls. Sal had 20 tennis balls, but he gave 6 of them to Joe.
How many tennis balls do Jenny and Sal have now?

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

Aline passes through 3,7 and 6,9 what equation represents the line

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