Rewrite 2x2−x−12 and 1x2−16 as equivalent rational expressions with the lowest common denominator.

Need on this one asap im almost done with this subject

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.

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122