Write an explicit formula for the a_(n), the nth term of the sequence 27,21,15

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Find the value of x for which line a is parallel to line b