Evaluate. write your answer as a fraction in simplest form.
-5/12 +4/9 -7/18

True or false? a circle could be circumscribed about the quadrilateral below.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.