If r is the midpoint of qs , rs = 2x-4, st = 4x-1, and rt=8x-43, find qs.

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?