Add the Polynomials 27.) 3y - 5 and 7y +8

28.) - 8xy - 4 and xy - 1

29.) 5a^3 -3a +7 and 7a^3 - 10a -8

30.) - 6x^3y + x^2 y^2 - 5xy and 8 x^3y - 10x^2 y^2 + 6

31.) x^2 -2x + 1 and x^4 + x^3 -x^2 + 5

32.) a^3b^2 - a^2b^3 and a^3b^2 - 5a^2b^3 + 7

Answer this 30 points and brainliest!

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?

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance