Answer
Day 7: 58 dollars
Total: 553 dollars
Work Step by Step
The rent on the 7th day is:
$$ = 100- (7)(6) \\ = 58 \ dollars$$
The total rent paid is:
$$ = (100)(7) - 7-14-21-28-35-42 \\ = \$553$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.