Determine if the sequence below is arithmetic or geometric and determine the common difference / ratio in simplest form.
15, 11, 7, ...

John bought 5 lemons and used 2 of them for a salad how much did he use for.a salad . he used % of the lemons.

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?

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3? f(x) = (x + 3)2 + 3 f(x) = (x + 3)2 − 6 f(x) = (x + 6)2 + 3 f(x) = (x + 6)2 − 6