I'd really appreciate it if anyone ! which relation is a function?

What is the solution to the equation 9^(x+1) =27

Big boi and travis scott are performing at the super bowl. travis scott is 62 years younger than twice big boi’s age. the sum of their ages is 70 years old. use b to represent big boi’s age. write and solve an equation.

Which of the following is the shape of a cross section of the figure shown below