Ruby is left with 10 dollars. .
What is graph?
Graph is a mathematical representation of a network and it describes the relationship between lines and points. A graph consists of some points and lines between them. The length of the lines and position of the points do not matter. Each object in a graph is called a node.
Ruby had a budget of up to $75 dollar to spend.
Total tags=13
Each tag is $5.
So,
Ruby spent on 13 tags
= 13*5
= $65
Thus, Ruby left with
=75 - 65 dollars
= 10 dollars.
Hence, Ruby has 10 dollars left.
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