Let y represent the total cost of publishing a book (in dollars). Let x represent the number of coples of the book printed. Suppose that x and y are related by the equation 1250 +15x = y.

expression #3 is not equivalent. the others are.

i dont understand the question? ?

step-by-step explanation:

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system