Mashaal Masha
$$x+y=75$$
The equation above relates the number of minutes, $x$, Maria spends running each day and the number of minutes, $y$, she spends biking each day. In the equation, what does the number 75 represent?
Difficulty: Easy
A: 

The number of minutes spent running each day

B: 

The number of minutes spent biking each day

C: 

The total number of minutes spent running and biking each day

D: 

The number of minutes spent biking for each minute spent running

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