Farmer Brown had ducks and cows. One day she noticed
that the animals had a total
of 12 heads and 32 feet. How
many of the animals were ducks
and how many were cows?

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?