Question

Please help ! Which one ?

Answer 1

Plug in solutions to see if equation holds true

Answer 2

Explanation:

20-8m≤4m≤-16

4m≤-16

m≤-4

20-8m≤4m

20≤4m+8m

20≤12m

m≥5/3

either m≤-4 or m≥5/3

so b and d can be the answer.