Another sigma notation question. check. hopefully i did this one correctly!

What is 32+4 x (16 x 1/2) -2 show your work}

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.

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.