Can someone help plz

Consider the system: y = 3x + 5 y = ax + b what values for a and b make the system inconsistent? what values for a and b make the system consistent and dependent? explain

Simplify the expression. -2/5(10+15m-20n)

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]