Atriangle has two sides of lengths 6 and 9. what value could the length of the the third side be? check all that apply

a.15
b.4
c.7
d.2
e.12
f.10

Knowed that the 3rd side of a triangle need being greater than the difference of the given two sides length and less that the sum of the given two sides length 
so with these knowledge we get 
x > (9-6) so x > 3
and 
x < (9+6) so x < 15

from these result that the 3rd side length can being choice B. 4 ,C. 7,F. 10,
E. 12,

hope this will help you 

Iwould say 48 bc the line of x is the line of 6 so 6×6=48