What structural decition does a translator make when translating an original text

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}