Add arithmetic symbols (+, -, x, )between the numbers to make the equation true. (You can use parentheses.) 1 2 3 4 5 6 7 8 9 = 100

Bank a charges a monthly service fee of $2.00 and per-check fee of $0.05, while bank b charges a monthly service fee $1.50 and a per-check fee of $0.10. which of these numbers of monthly checks will cause bank a to charge less in fees than bank b?