The best way to solve is by elimination. First, write the equations in standard form. 12x-y=18 13x-y=18 Multiple the bottom equation by -1 Β 12x-y=18 -13x+y=-18 Add. -x=0 x=0 Plug into other equation 12(0)-y=18 0-y=18 -y=18 y=-18 Your answer is B. (0,-18)
What is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.