Ignore the one I clicked on

Using two or more complete sentences, describe how you can find a vector parallel to b=-2,3

The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams and standard deviation 161 grams. what is the probability that a randomly selected broiler weighs more than 1,425 grams?

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