Plzzz help me with 1 and 2

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.

What is the ordered pair of m’ after point m (5, 6) is rotated 90° counterclockwise?

At the play,8 students from mr.franks room got a seat.if there were 17 childern from room 24,how many childern did not get a seat ?