Sarah has a bag of 100 marbles. 40 are blue, 40 are green, and 20 are purple.

What is the probability of Sarah picking a blue marble on 2 consecutive draws without replacement?

Select the sequences that are geometric.

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.