Respuesta :

sqdancefan

Answer:

  1075/42

Step-by-step explanation:

  [tex]\dfrac{250}{12}+\dfrac{100}{21}=\dfrac{250(21)+(12)100}{(12)(21)}=\dfrac{6450}{252}\\\\=\dfrac{(6)(1075)}{(6)(42)}=\boxed{\dfrac{1075}{42}}[/tex]