Heelp me oonn this i dont understand leeaase its homework pleeaassse thank uuu

Abag contains 3 red marbles 4 white marbles and 5 blue marbles if one marble is drawn from the bag what is the probability that the marble will be blue

Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0