A worker ar a pet store tells jillian that the total length of the fish in her aquarium should be no more than 10 inches black phantom tetras are 2 inches long and neon tetras are 1.25 inches long

Respuesta :

3x + 1.25 < 10
      -1.25    -1.25
----------------------
          3x   < 8.75
        -----     -------
          3           3
       
      x = about 3


  less than or equal to sign