Sarah backstrokes at an average speed of 8 meters/second and swims for 250 seconds, how far did she swim?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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.

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2