B= {x | x>=3}

C={x | x>7}

- All categories
- Pre-Algebra Answers 12,220
- Algebra 1 Answers 25,109
- Algebra 2 Answers 10,373
- Geometry Answers 5,131
- Trigonometry Answers 2,627
- Calculus Answers 5,912
- Statistics Answers 2,999
- Word Problem Answers 9,917
- Other Math Topics 6,455

80,743 questions

84,725 answers

2,107 comments

68,310 users