Which describes the algebraic expression, 4x + 6?

Which of the following expressions is equal to 2x^2+8

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

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.