10 weeks
Step-by-step explanation
Step 1
Let w represents the number of weeks
total=750
weekly expenses =50 per weeek=50w
Step 2
make the inequality
Marc has a total of $750 in his account. Every week he withdraws $50 to pay for his weekly expenses,
Step 2
now, solve for w
it means after 10 weeks he will have at least $250
I hope this helps you