Which number in the set {6, 12, 18, 36} satisfies the equation 3x-9=27?

Find the value of the variable and the length of each secant segment.

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

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?