Determine the price and quantity for which revenue is maximised given a firm demand function of a particular commodity to be (12-q)^1/2

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

How do i do this activity, is appreciated

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?