If the 8th term of an A. P. is three times the 4th term, find the equation connecting a and d, where a is the first term and d is the common difference.

Which one ? is the answer and how to find this answer

Ok a point t on a segment with endpoints d(1, 4) and f(7, 1) partitions the segment in a 2: 1 ratio. find t. you must show all work to receive credit.

Maren is buying carpet for her rectangular living room. the room is 4.8 yards wide and 5.2 yards long. how much carpet does she need to buy? enter your answer as a decimal in the box. yd2