100 points AGAIN (bc I'm a legend) I really need help... what is 2+5?

jk i wanted to give away points.
answer the question though so moderators don't come after me AGAIN

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Ian is in training for a national hot dog eating contest on the 4th of july. on his first day of training, he eats 4 hot dogs. each day, he plans to eat 110% of the number of hot dogs he ate the previous day. write an explicit formula that could be used to find the number of hot dogs ian will eat on any particular day.