A bag contains 42 red marbles, 8 white marbles, and 6 gray marbles. You randomly pick out a marble, record its color, and put it back in the bag. You repeat this process 280 times. How many white or gray marbles do you expect to get? If you randomly pick out a marble and replace it 280 times, you can expect white or gray marbles to be chosen.

Ateacher noticed 5/8 of the students were wearing either blue shorts or white shorts. write two different ways this could be done.

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Which of the following quartic functions has x = –1 and x = –2 as its only two real zeroes?