Respuesta :

clarch19

Answer:

45 sandwiches

Step-by-step explanation:

create a proportion from sandwiches to people equals sandwiches to people

21/14 = s/30

21/14 can be reduced to 3/2

let 's' = # of sandwiches

3/2 = s/30

cross-multiply to get:

2s = 90

s = 45