How does 300 turns on a primary coil and 3o turns on a secondary coil become 10: 1 ratio?

Which point is on the line y=-2+3? (-2,-1) (3,3) (3,-3) (-3,-9)

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?

Factor the polynomial by its greatest common monomial factor.