- All categories
- Pre-Algebra Answers (11,968)
- Algebra 1 Answers (24,320)
- Algebra 2 Answers (10,090)
- Geometry Answers (4,880)
- Trigonometry Answers (2,507)
- Calculus Answers (5,594)
- Statistics Answers (2,851)
- Word Problem Answers (9,169)
- Other Math Topics (5,483)

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

...