Make r the subject of the formula t=r/r-3

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

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?

What is the length and width of a 84.5 square foot rug? will mark