There are 15 purple marbles, 3 pink marbles and 12 gray marbles. What is the ratio of purple marbles to all marbles?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?

The equation ip| = 2 represents the total number of points that can be earned or lost during one turn of a game. which best describes how many points can be earned or lost during one turn?