John claims that he can get the same answer to the problem below by adding up (begin with 6+8) or by adding down (begin with 9+8). He wants to know why and if this works all the time. How do you respond?

Which system of linear inequalities is graphed? can somebody pleasssse

Factor this polynomial completely x^2-64

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?