Mike bought 9 new baseball trading cards to add to his collection. the next
day his dog ate half of his collection. there are now only 43 cards left.
how many cards did mike start with ?

Derek purchased a new gym membership. it costs him seven dollars a month plus two dollars for every time that he visits the gym. he wants to spend less than 25 dollars a month to visit the gym. write an inequality that models the situation using the variable v for the number of visits per month. also find the maximum number of visits he can make to the gym and still keep his cost below 25 dollars a month.