Sammy solved 68 math problems in 17 minutes. At what rate did Sammy solve the math problems?

Answer pls man im trying to get out of summer school

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

Here is my question! jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?