Jillian has $50 that she plans on investing in an account that will double her money every week. this can be represented by the equation m = 50(2)x where m represents the amount of money she has and x represents the number of weeks that have passed. her uncle charlie gives her a gift of $400 so she decides to start her investement with that money plus the $50 she already had. what should be changed in the equation m = 50(2)x to represent the new situation?