If de=7x+3 and ef=9x-19 than what is ef

Which of the following are accepted without proof in a logical system? check all that apply.

Which table shows a proportional relationship between miles traveled and gas used?

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?