Final answer:
Jamie will need to save for 20 weeks to reach at least $144 in her bank account, starting with -$48 and saving $9.60 per week.
Step-by-step explanation:
The question asks how many weeks it will take for Jamie to save enough money to have at least $144 in her bank account, given that she currently has -$48 and saves $9.60 per week. To solve this, we need to first calculate the total amount Jamie needs to save to reach $144 starting from -$48. The difference between $144 and -$48 is $144 - (-$48) = $144 + $48 = $192.
Next, we divide the total amount needed, $192, by the amount Jamie saves each week, $9.60. Calculating $192 / $9.60, we find that it will take Jamie 20 weeks to save at least $144. This is a straightforward algebra problem involving simple addition and division.