1. How many swimmers swam the 50-meter swim? 2. Which time was the most common?

3. What is the difference between the fastest swim and the slowest swim?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

Need on this geometry question. explain how you did it.

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.