Cost of each package:
Hot dog = $3.25
Buns = $2.75
Hamburgers = x (x = the cost of each hamburger package)
Tony bought 3 packages of hot dogs, 3 packages of hamburgers, and 5 packages of buns for a total cost of $37.75. So:
Cost of hot dog = 3(3.25) [3 hot dog packages for $3.25 each]
Cost of bun = 5(2.75) [5 bun packages for $2.75 each]
Cost of hamburger = 3x [3 hamburger packages for x dollars each]
Cost of hamburger + Cost of hot dog + Cost of bun = total cost
3x + 3(3.25) + 5(2.75) = 37.75
Your answer is A and D, because for A you distribute 3 into (x + 3.25), which will be (3)x + (3)3.25.