Respuesta :

Answer:

B and C

Step-by-step explanation:

5 * (7 + 6s - 9t) = 7*5 + 6s *5  - 9t*5

                       = 35 + 30s - 45t

(-35 - 30s + 45t)*(-1) = (-35)*(-1) - 30s *(-1) + 45t*(-1)

                               = 35 + 30s - 45t

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