Most constructions are just done with a straight edge and a compass.
You would use the compass to measure the length of the segment. Just open the compass from one endpoint to the other. Then, you can use that to draw a congruent line segment.
3.8 liters times 1 is 1 gallon 3.8 liters times 39 is 39 gallons 3.8 times 39 is 148.2 liters
Answer:
6.7-(-2.5)=9.2 6.7+(-2.5)=4.2 Neither
2.5 + 6.7 6.7 - 2.5 2.5 - 6.7
-2.5 + 6.7 -2.5 - 6.7
-6.7 + 2.5