I have worked out trapezium's area but didn't work out triangle's. I need it fast, for tomorrow​

anyone? find the second, fifth, and ninth terms of a sequence where the first term is 65 and the common difference is -7. 72, 93, 121 72, 79, 86 58, 37, 9 58, 51, 44

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.