Final answer:
It will take Kari 10 weeks to have a total of $155.
Step-by-step explanation:
To find out how many weeks it will take Kari to have a total of $155, we can set up an equation.
Kari earns $12 per week, so we can represent her earnings as 12w, where w is the number of weeks.
Since Kari already has $35, we add that to her earnings and set it equal to $155:
12w + 35 = 155.
Next, we can solve for w by subtracting 35 from both sides:
12w = 120.
Finally, we divide both sides by 12 to find w:
w = 10.
Therefore, it will take Kari 10 weeks to have a total of $155.