3less than the quotient of 20 and c

What is the anwers for 9+2x=5x-3-x

Apopulation of 1500 insects grows exponentially, by a factor of 3 every week. select all equations that represent or approximate the population, p, as a function of time in days, t, since the time it was 1500.

Enter the amplitude of the function. f(x)=3cosx