If a diagonal lies outside of the polygon then the polygon is concave. true or false

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?