PEOPLE WHO ARE GOOD AT MATH can you please help me on question 12? I did not get it. people who give random answers will get reported so please stop-

Lilianna uses 3/4 calories per minute just by sitting. she uses 1 more calorie per minute by walking. lilianna uses a total of 12 1/4 calories walking to the park. lilianna uses the equation, d(.75+1)=12.25 to represent the situation. what does the variable d represent in the equation?

How do you divide 9/4 divided by 10/3

Charles is on a 8 1/2 mile bike ride. he stops for a rest after he’s gone 5 2/5 miles. how much farther does he still have to go?