How many ways are there to distribute n graded homeworks to n students such that none of them gets their own homework back?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)

Ahighway between points a and b has been closed for repairs. an alternative route between there two locations is to travel between a and c and then from c to b what is the value of y and what is the total distance from a to c to b?