Question is down below here ⬇️ PART 4

Amajor grocery store chain is trying to cut down on waste. currently, they get peaches from two different distributors, whole fruits and green grocer. out of a two large shipments, the manager randomly selects items from both suppliers and counts the number of items that are not sell-able due to bruising, disease or other problems. she then makes a confidence interval. is there a significant difference in the quality of the peaches between the two distributors? 95% ci for pw-pg: (0.064, 0.156)

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

I’m really confused and need your assist me with this question i’ve never been taught