Answer:
70 buttons
Step-by-step explanation:
We have been given that Matty needs 200 buttons and Amy gives her 13 nm bags with 10 buttons in each bag.
Let us find out number of buttons that Amy gave to Matty.
[tex]13*10=130[/tex]
Now we will subtract 130 from 200 to find number of buttons that Matty needs now.
[tex]200-130=70[/tex]
Therefore, Matty needs only 70 buttons now