The weather forecast in boston last night was for the temperature to drop 3•f each hour. if the temperature was 7•f at 8: 00pm, what was the temperature at midnight? a. +21•f b. -21•f c. -5•f d. -12•f

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.

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

Two consecutive negative integers have a product of 30. what are the integers?