Randy has $3.55 worth of dimes and quarters in his pocket. the number of dimes is four more than twice the number of quarters. which system of equations can be used to find how many dimes (d) and quarters (q) randy has in his pocket?

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?