Answer:
the answer is -153
Step-by-step explanation:
350-200(she paid off 200$)=150
150+23(she charged her account 23$)=173
173-35(she paid off 35$)=138
138+15(she charged her account 15$)=135
her new balance is -153$ because that is how much she has left to pay off before she reaches 0 then she can gain credit.