find the matrix a of the reflection in the line l in R^2 that consists of all scalar multiples of the vector [3,4]

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

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?

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8