If x is greater than or equal to zero, then what is x plus the absolute value of x

What term makes it inconsistent y=2x - 4 ?

Fracisco's game involves 3 green, 2 yellow, 4 red, and 3 black marbles. if he randomly draws three marbles from the bag, without replacement, what is the probability that he will draw yellow, and then red, and then black? a)1/192 b)1/72 c)3/220 d)1/55

Afield is shaped like the figure shown