2. n, 5n and 2n; 2m and 6m
3. 2g, 3g and g
4. 7x2, 3x2 and y2; x and 3x; 2 and 3
6. v + w + 10
7. 6c2 + c
8. 4z +3e +5
10. 3a + 5a + 4a
11. perimeter of square = 4s = (4)(6x) = 24x, the answer is C
12. perimeter of rectangle = 2L+2W = 2(4x+5) + 2(8x-4) = 8x + 10 + 16x - 8 = 24x + 2 the answer is letter D
