An urn has 15 red, 7 white and v blue balls. what is the probability of picking a blue ball (v=test version number)

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?