Asap! i need to pass this test! which expressions are perfect square trinomials? select all that apply. a. x^2+20x+10 b. x^2+7x+49/5 c. 9x^2+12x+4 d. 16x^2+24x+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.