Domain, range , functions

What two criteria are needed for triangles to be similar

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.

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2