How can you show the two objects are proportional.

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Which expression shows the sum of the polynomials with like terms grouped together

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.