PLZ HELP ME WITH THIS

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

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 of the following vectors are orthogonal to (2,1)? check all that apply