Answer:

Explanation:
We can determine the algebraic expression that represents her current available credit by first finding her new balance using the formula:
Previous balance - Payments + Total Purchases = New balance
where, previous balance = $1000; payments = $800; total Purchases = y
New balance =

Next, to find her Credit balance or current available; we use the formula; Credit line - New balance
where credit balance = x; new balance =

Current available credit =
