The circumference of a circle is equal to pi times the diameter. which direct variation equation represents this situation?
a) d=pic
b) c=pid
c) c=pi/d
d) d=pi/c

Which is f(5) for the function –2x2 + 2x - 3?

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?