If 3a-b=3 and a+2b=15, then a+b ?

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

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?

How many verticies does a triangular prims have