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?

Options

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

Explanation

To solve the question regarding the equation \( x + y = 75 \), we need to analyze what each variable represents and what the total signifies.

1. **Understanding the Variables**:
- The variable \( x \) represents the number of minutes Maria spends running each day.
- The variable \( y \) represents the number of minutes Maria spends biking each day.

2. **Analyzing the Equation**:
- The equation \( x + y = 75 \) combines the minutes spent on both activities.
- This means that the total time Maria spends running and biking each day is equal to 75 minutes.

3. **Identifying the Meaning of 75**:
- Since \( x + y \) equals 75, this number represents the total time spent on both activities.
- Therefore, 75 minutes is the sum of the minutes spent running and biking.

4. **Conclusion**:
- The number 75 in the equation represents the total number of minutes Maria spends running and biking each day.

Thus, the correct interpretation of the number 75 is that it represents the total number of minutes spent running and biking each day.

### Answer:
The number 75 represents the total number of minutes spent running and biking each day.