In triangle nlm, point s is the centroid, qs = (3x – 5) cm, and ns = (4x) cm.
what is ns

1.    The centroid divides each median in the ratio 2: 1, starting from the top.

NS/QS=2/1

4x/3x-5=2/1

4x=6x-10

-2x=-10

X=5

NS=5*4=20 cm

so what is the question

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional