Solve the system by graphing. If the solution does not appear to be a lattice point, estimate the solution to the nearest tenth (indicate that your solution is an estimate). 
Definitions:
Purchases Journal
A purchases journal is a special journal used in accounting to record all purchases of merchandise, supplies, or other assets on credit.
Horizontal Analysis
Financial analysis that compares an item in a current statement with the same item in prior statements.
Vertical Analysis
An analysis that compares each item in a current statement with a total amount within the same statement.
Percentage Analysis
A financial analysis technique that expresses each item in a financial statement as a percentage of a base amount.
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