9 marbles your draw one what is the probability of drawing a red pen? You have 2 yellow 3 black and 4 reds

The table shows the distance traveled over time while traveling at a constant speed.

Ineed if you could explain and give me the answer you! this needs done

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?