What is 2.915 rounded to the nearest tenth and to the nearest one?

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.