Given the expression 9(2t+7), to evaluate we will simply open the parenthesis using the distributive law. According to the law, A(B+C) = AB+AC
Applying this to the question
9(2t+7) = 9(2t) + 9(7)
9(2t) + 9(7) = 18t+63
Hence the answer to the expression is 18t+63.