I typed in my answers for savings, clothings, entertainment and charitable giving, but I can’t submit it? Help?

When is g(x) = 0 for the function g(x) = 5.23x + 4?

If (x + 8) is a factor of f(x), which of the following must be true? both x = –8 and x = 8 are roots of f(x). neither x = –8 nor x = 8 is a root of f(x). f(–8) = 0 f(8) = 0

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21