Which ratio forms a proportion with 18/27 ? a13 b25 c23 d79

Afactory adds 3 red drops and 2 blue drops of coloring to white paint to make each pint of purple paint. the factory will make 50 gallons of the purple paint.how many drops of red and blue coloring will the factory need in the 50 gallon batch of purple paint.

Consider 6x2 + 6x + 1. which term immediately tells you that this expression is not a perfect square trinomial? justify your answer

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?