Anyone know how to do this? The population of a small village has grown at an annual rate of approximately 5.5%.

How long will it take for
its population to double at this growth rate?

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

How do you do the foil method with polynomials?