- All categories
- Pre-Algebra Answers (11,954)
- Algebra 1 Answers (24,237)
- Algebra 2 Answers (10,059)
- Geometry Answers (4,859)
- Trigonometry Answers (2,480)
- Calculus Answers (5,562)
- Statistics Answers (2,831)
- Word Problem Answers (9,091)
- Other Math Topics (5,331)

since a positive times a negative equals a negative, 4 times -7 equals -28

...