A. (-1,0)
B. (0, -2)
C. (-2, 0)
D. (0, -1)

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.

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25