Question

17. If -3 < a < 1, -2 < b < 2, -1 <C<4 and 1 sd <3, which of the following is true?
1) -9 < ab + cd < 12
3) -9 < ab + cd < 18
2) -6 < ab + cd < 18
4)-6 < ab + cd < 12​

Answer 1

Answer:

4th one i think is the answer