18/30 simplifies into 6/10 which then is put in decimal form of 0.6
The sum of the lengths of two shorter sides of a triangle must be greater than the length of the longest side.

The answer is D.
I think the answer is 1.5 but I’m not 100%sure
The answer is -7 because you subtract the opposite of 8 and -6-8 is adding two negatives then -14 divides by 2 equals -7 which equals x (-7=x)