Find RT Write answer as an integer or as a decimal rounded to the nearest tenth

pls help pls

Let f(x)=2x and g(x)=2x. graph the functions on the same coordinate plane. what are the solutions to the equation f(x)=g(x) ?me asap

Through non-collinear points there is exactly one plane.

Anumber is equal to twice a smaller number plus 3. the same number is equal to twuce the sum of the smaller number and 1. how many solutions are possible for this situation