12+4a-3a+5a=16-7-9-2a+2a what does "a" equal?

Which of the following exponential functions goes through the points (1, 6) and (2, 12)? f(x) = 3(2)x f(x) = 2(3)x f(x) = 3(2)−x f(x) = 2(3)−x

Layla answer 21 of the 25 questions on his history test correctly.what decimal represents the fraction of problem he answer incorrectly.

If f(x)=1/x and g(x)=x+4 which of the following is the graph