Answer:
Upper left: the answer is 2, becuase 2 times 5x = 10x
Upper right: the answer is 4y, because 6 times 4y = 24y
Lower left: the answer is 3, because 3 times 3a+2b = 9a+6b
Lower right: the answer is 3a+2b, because 4 times 3a+2b =12b+8b
Let me know if this helps!
