Which sets of ordered pairs show equivalent ratios? Use the grid to help you. Check all that apply. (1, 2), (2, 3), (4, 7)
(2, 2), (4, 4), (6, 6)
(3, 1), (4, 1), (5, 1)
(4, 1), (8, 2), (12, 3)
(2, 1), (4, 3), (5, 4)

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

3-12. write each answer with a reasonable number of figures. find the absolute uncertainty and percent relative uncertainty for each answer. (a) [12.41 (±0.09) + 4.16 (±0.01)] x 7.068 2 (±0.000 4) =? (b) [3.26 (±0.10) x 8.47 (±0.05)] - 0.18 (±0.06) =? (c) 6.843 (±0.008) x 104 + [2.09 (±0.04)- 1.63 (±0.01)] =?

Can someone me out here and the tell me the greatest common factor