42% as a decimal to Nearest hundredth

How do you use the elimination method for this question? explain, because i really want to understand!

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

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.