Final answer:
To find out how much Isabella has left to spend each week, subtract the cost of the bowling league and the amount she saves from her weekly allowance. Isabella has at least $3.50 left to spend each week.
Step-by-step explanation:
To find out how much Isabella has left to spend each week, we can subtract the cost of the bowling league and the amount she saves from her weekly allowance. Let's represent the amount Isabella has left to spend as 'x'. The inequality equation would be:
$15.00 - $6.50 - $5.00 ≥ x
Simplifying the equation, we get:
$3.50 ≥ x
So, Isabella has at least $3.50 left to spend each week.