Which of the following sets of ordered pairs is not a function?

{(0, 2), (1, 4), (2, 5), (3, 6)}
{(-1, 2), (1, 3), (1, 5), (-3, 4)}
{(0, 2), (1, 2), (2, 2), (3, 2)}
{(-4, 3), (-1, 1), (-2, 5), (3, 7)}

Arestaurant needs to buy thirty-seven new plates. if each box has five plates in it, how many boxes will they need to buy?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares