Which form most quickly reveals the vertex?

1. m(x)=4x2−8x−32

2. m(x)=4(x−1)2−36

3. m(x)=4(x+2)(x−4)

what is the vertex

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.