Simplify please sorry last one(2y+1)^2-4y^2+2

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

The graph of a hyperbola is shown. what are the coordinates of a vertex of the hyperbola? (0, −4) (−3, 0) (0, 0) (0, 5)

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible