Answer:
Question 3: 
Question 4: 
Question 5: 
Step-by-step explanation:
Question 3:

Question 4:
sign flips when r switches sides
Question 5:

To check your answer in long division multiply the divisor by the quotient to get your dividend
809.50
Step-by-step explanation:
I mean it is correct
75 represents the total minutes spent running and biking
<h3>How to interpret the equation?</h3>
The given parameters are:
- x = number of minutes spends running
- y =number of minutes biking
The equation is given as:
x + y = 75
The above means that when the minutes spent running and the minutes spent biking are added, the total is 75
Hence, the 75 represents the total minutes spent running and biking
Read more about equations at:
brainly.com/question/2972832
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