The number of sit-ups Micah does is the sum of twice a number and 25. The number of sit-ups Micah does is also 3 times the number minus 25. How
many sit-ups does Micah do? (hint: set up two equations, then solve for each variable)

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?