At the outlet mall, Erin buys a book that is 12% off and gloves that are reduced to $27.96. Erin
spends a total of $52.01. Let d represent the
cost of the book. Which equation correctly
represents the cost of Erin's shopping trip?

Abag contains 5 red marbles , 6 blue marbles and 4 green marbles. susie selects a marble and returns it to the bag before selecting another marble. if susie selects a red marble 6 out of 20 times, what is the experimental probability that the next marble she selects will be a red marble ?