Two grocery stores charge amounts for Henry’s favorite olives

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1

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.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?