3x-5 is a midline of that triangle so:

Answer D.
Answer:
Range!
Step-by-step explanation:
It's the range because it's subtracting largest and smallest number in the set.
Answer:
64
Step-by-step explanation:
1.2 meters = 120 centimeters
amount of increase = 120-80 = 40 centimeters
40 ÷ 80 = 0.5 = 50%
There was a 50% increase.