Will give brainliest :)

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?

Y+ 2/y is it a polynomial in one variable or not? and if so, why?