- All categories
- Pre-Algebra Answers (11,956)
- Algebra 1 Answers (24,294)
- Algebra 2 Answers (10,079)
- Geometry Answers (4,872)
- Trigonometry Answers (2,497)
- Calculus Answers (5,579)
- Statistics Answers (2,837)
- Word Problem Answers (9,135)
- Other Math Topics (5,438)

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

...