Una familia a consumido en un día de verano dos botellas de litro y medio de agua 5 botellas de 1/4 de litro de jugo de manzana 4 botellas de 1/4 de limonada cuántos litros de líquido han bebido podemos directamente sumar y restar fracciones de distintos denominadores

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?