There are 10 purple, 4 green and 6 yellow marbles in a bag. Find the probably of the following. 4) P(green)
5) P(not yellow)
6) P(Purple or yellow)

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field