How can the additive inverse be used to evaluate the problem below?

-3-(-6) ???

The average of 5 distinct scores has the same value as the median of the 5 scores. the sum of the 5 scores is 420. what is the sum of the 4 scores that are not the median? * explain how you found the answer * a) 315 b) 320 c) 336 d) 350 e) 360

Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.

Which expression will have the same sum as 3_8 + 1/4?