\f9. log4 (2m' -14m-) -log4 (2m) = log4 8 10. 2 . log (x - 3) = log 25 11. log; (2x - 7)= 4 12. log; (28k - 20) +15=18 13. log, (15 - 47) = 14. log2 4 + log2 (c -9) = 5 15. 2 -log4 k = 4 16. log: (p2 +15) = 2Explanation: 1. sin 67 / 22 = sin 78 / x x = 22 sin 78 / sin 67 x = 23.4 2. sin 126 / x = sin 33 / 8 x = 8 sin 126 / sin 33 X = 11.9 3. sin 39 / x = sin 83 / 14 x = 14 sin 39 / sin 83 X = 8.9 4. angle C = 180 - 64 - 87 angle C = 290 degrees (third angle) sin 29 / x = sin 87 / 45 x = 45 sin 29 / sin 87 x = 21.8 5. angle C = 180 - 105 - 45 angle C = 33 degrees (third angle) sin 33 / 32 = sin 105 / x x = 32 sin 105 / sin 33 x = 56.8 6. angle C = 180 - 51 - 65 angle C = 64 (third angle) sin 64 / x = sin 51 / 27 x = 27 sin 64 / sin 51 x = 31.2 7. sin 63 / 28 = sin x / 29 sin x = 29 sin 63 / 28 x = sin" [ 29 sin 63 / 28 ] x = 67.3 degrees