This is the answer, attached below. :)
Answer:




I am sorry but I am not sure of this :(
Answer: (D) 1.99x + 1.89y = 9.57
Step-by-step explanation: The reason is because equation option D states that for every notepad and pencil, x and y he bought, the total of his bill would equal $9.57.
You need to multiply the two numbers. Or you can use long addition.