Help solve the system of differential equations

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

If there are 825 students at cherry hill high school and 4 out of every 5 students voted in the student council election, how many students voted?