A bag contains 20 marbles - 10 blue and 10 red. What is the probability of selecting 2 blue marbles at random with replacement? *

Amotorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning. the total time for the trip was 8.0 hours. use this information to find the speed of the current.

The angle of depression from the top of the tree to the tip of the shadow is 25°. find the height of the tree to the nearest tenth. a. 16.8 feet b. 18.2 feet c. 23.4 feet d. 39.7 feet

Which angle of rotation is an angle of rotational symmetry for all figures?