He sum of two numbers is negative twelve​, and one number is five​ less than the other. Using the variables mm​ and nn​ to represent the two numbers, write a system of equations that describe the situation. Enter the equations below, separated by a comma.

Write a division equation you could use to find a, the number of miles ava is in charge of. what is the value of a? write your answer is simplist form

Icould really use some with this question.

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?