Ifx =6 then x can only be equal to 6 true or false

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?

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

17 in long 1.3 ft wide and 8in high what is the volume