lissetgarc09 lissetgarc09 14-05-2020 Mathematics contestada Let r = <3, −2>, s =<−1, 5>, and t =<4, −6> r = < 3 , −2 > , s =< − 1 , 5 > , and t = < 4 , −6> then s + 3t =<11, −13> True or false?