Which are the possible side lengths of a triangle?
3 cm, 5 cm, 9 cm
o4 cm, 8 cm, 10 cm
6 cm, 9 cm, 17 cm
8 cm, 10 cm, 18 cm

4 cm, 8 cm, 10 cm

Step-by-step explanation:

The sum of any 2 sides of a triangle must be greater than the measure of the third side

all it means is function 3

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x