3x+12y=9 and -x-4y=-3 solve by elimination please all i need is the explanation i already have the answer pleas
i need help

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Me with geometry ! in this figure, bc is a perpendicular bisects of kj. dm is the angle bisects of bdj. what is the measure of bdm? •60° •90° •30° •45°