Pls hel ‼️‼️12 points‼️6y+12=18 for y

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 multiply a mixed fraction by a regular fraction

Landon wrote that 3−2.6=4. which statement about his answer is true?