#73 = answered by zirkoni
72. It's 11kmph. On still water it travels at 55kmph. Going downstream it's 66kmph (22 divided by 0.33 because 20mins = 1/3hr = 0.33hrs), and going upstream it's 44kmph (22 divided by .5 because 20mins = 1/2hr = 0.5hrs)
69. Answer is A. 40. In 4 years, Tom will be 44 years old and Todd will be 14. 14 x 2 + 16 = 44.
68. In coordinates, X is left side, Y is right side. All X values = Domain, All Y values = Range. So it's D.
67. C. Read my solution for 68 and you'll see why it's C.
66. My logic guessed that it's C, but I haven't encountered stuff like this in domain and range. So I could be wrong.
64. I forgot how to solve this one, sry.
58. D. (75 multiplied by 1.3) + (85 multiplied by 1.9)