Alex has had 15 quizzes. he had 80 85 80 75 90 95 85 90 95 100 90 75 85 90 85. make a line plot.

Pls , the question is in the picture!

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?