I need help on this pls

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Solve 2x+y=3 x+y=5 in substitution method

Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)