A bag contains 3 red, 4 blue, and 6 yellow marbles. One marble is selected at a time, and once a marble is selected, it is not replaced. Find the probability.

red=3/13  blue=4/12  yellow=6/11

Step-by-step explanation:

3 red, 4 blue, 6 yellow

NOT REPLACED

3+4+6=13

13 is the 1st denomenator

 3     4      6

__ x __ x __

13      12    11

they denomenators ^decrease^ because they are NOT replaced

2 5/8 is the final answer! : )

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40