What are the coefficients in the polynomial 55a + 22b – 1.4? Do not include the constant term. Select all that apply. 1. b
2. 22
3. 1.4
4. 55a
5. 22b
6. \(-1.4)
7. /(55/)​

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?