Answer:
$300
Explanation:
Though you didn't include the expression in the question but the question can be solved using the below method
Total savings=$1000
Month 1 withdrawal=$25
Each successive month=$10 more than the previous month
first month=$25
Second month=$35
Third month=$45
Fourth month=$55
Fifth month=$65
Sixth month=$75
Seventh month=$85
Eighth month =$95
Ninth month=$105
Tenth month=$115
Total withdrawal=25+35+45+55+65+75+85+95+105+115
=$700
The amount left in Hannah's savings account=Total savings - Total withdrawal
=$1000-$700
=$300