There is a bag with only red marbles and blue marbles. The probability of randomly choosing a red marble is
5
7
.
There are 30 red marbles in the bag and each is equally likely to be chosen.
Work out how many marbles in total there must be.

While scuba diving, rajeev dove to a depth of 12.6 feet below the surface of the water and then descended another 8.7 feet. what expression can be used to find rajeev's new position? 12.6 – 8.7 –12.6 – 8.7 –12.6 – (–8.7) 12.6 – (–8.7)

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?

Could someone with number 1 and 2