6. product a is a 12-ounce bottle of generic mouthwash that sells for $1.39. product b is a 24-ounce bottle of mouthwash that costs $2.79. which is the better buy?

Which of the following questions describes the equation g + (-4) = -5? a)what number, when added to negative four, is equal to negative five? b)what number, when added to negative five, is equal to negative four? c)what number, when subtracted from negative four, is equal to negative five? d)what number, when subtracted from negative five, is equal to negative four?