Answer:
10
Explanation:
The restriction m < 0 means we can multiply by -7m/2 without changing the direction of the inequality symbol
![(3)/(m)\le-\frac27\\\\-(21)/(2)\le m\qquad m<0}](https://img.qammunity.org/2022/formulas/mathematics/high-school/qziif2o86mps1wt8h3szix9xxv59fjmh53.png)
Then the solution is the number of negative integer values between -10.5 and 0. There are 10 negative integer values of m that satisfy the inequality.