.help me

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?

What is the area of mnp? 40 m2 60 m2 68 m2 127.5 m2

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?