Two trains leave stations 418 miles apart at the same time and travel toward each other. One train travels at 100 miles per hour while the other travels at 90 miles per hour How long will it take for the two trains to meet?
Do not do any rounding

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.

Determine the area of a triangle with (see picture below)

Which expression is equivalent to 64 - 9x^2?