What are the first 3 terms of the sequence represented by the expression n[n-1]-4 the first term is when n=1

Asphere has a diameter of 10 in. what is the volume of the sphere?

What is the y-intercept of the line given by the equation

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.