Given that f(x) = x2 - 4x – 21 and g(x) = x – 7, find f(x) – g(x) and express the result in standard form.

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?

Acircle has a circumference of 28.36 units what is the diameter of the circle

Pranza plotted point a in the coordinate plane below.