Joan is selling handmade bead necklaces at a local art fair. she paid $250 to reserve her booth. the cost of supplies for each necklace averages $2. so, her cost, y, for x necklaces is represented by y=$250+2x. if she sells her necklaces for $12, her revenue, y, is represented by y=12x. use the system of equations to find how many necklaces joan needs to sell to break even.