Sam has $40. He buys a book for $12.99 and a puzzle for $15.49. Which equations can be used to find how much money Sam has left? And don’t understand.

Which number produces a rationale number when multiplied by 1/5

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.