Can someone help me please

Me write an equation for the interior angles of this triangle that uses the triangle sum theorem

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

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?