and now substitute.

substitute into first to get now solve.2) Solve the following system of equations for x. Y=x^2+4x-7 and 2x-y=-1

(f-g)(-1) = f(-1) - g(-1)3) Use the functions f(x)=x^2-5 and g(x)=x+2 to answer the following

Find and simplify (f-g)(-1)

Find and simplify (fog)(x)

(fog)(x) = f(g(x)) = f(x+2) = (x+2)^2 - 5

Since a=3>0 it means it has a minimum which occurs at x=-b/2a.4) Given the parabla f(x)=3x^2-6x+1, state and identify the maximum or minimum value.