Mark is a coin collector at the first store he went to he bought 3 sets of 4 coins at the second store he bought 5 sets of 3 coins he then decided to sell 5 coins he totaled his number of coins and the gave his brother 8 coins how many coins does he have left?

At the beginning of the year, adrian's savings account balance was \$28$28. each week, he deposits another \$15$15 into that account, and he doesn't spend any of his savings. is his savings account balance proportional to the number of weeks since the start of the year?