Astore sold 70 copies of a magazine for $350. each copy of the magazine costs the same. which equation and set of ordered pairs best represents the price (y), in dollars, of a certain number of copies (x) of the magazine?

45

step-by-step explanation:

i don't know

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.