Which one is an exponential function?

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

What is the value of x in the equation 6(x + 1) – 5x = 8 + 2(x – 1)?

Which of these sequences is a geometric sequence a 1,2,4, 7, 11, 16, 22. b. 2.4.8.14.22.38 c.3.6.9. 15.18,21 d. 3,9,27,81,243,729,