Afarmer owns some goats and chickens. he counts 144 legs on his farm. the number of chickens is 4 times the number of goats. how many chickens are on the farm?

What is the exact volume of the cylinder? 16in going into the middle of the top of the cylinder and 40in in height a) 25,600(pi)3 b)10,240(pi)3 c)1280(pi)3 d)640(pi)3

Three coins are flipped. what is the probability that there will be at least two tails?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²