Y=x-6 3x + 2y=8 use the substitution method how to solve?

What additional information could be used to prove abc =mqr using sas? check all that apply.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

(fog)(x) if f(x)=x^2- 4 and g(x)=x^2 + 2 x, f(g(x))= f(x^2+2x) (x^2+2x)^2-4 (x^2+2x)(x^2+2x)-4 (x^4+2x^3+5x+4x^2)-4 x^4+2x^3+4x^2+5x-4 what am i doing wrong