Given the function f(x)=-x^2-7x+19f(x)=−x 2
−7x+19, determine the average rate of change of the function over the interval -9\le x \le 3−9≤x≤3.

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.