Look at the picture.
ΔABD and ΔBCD are similar, therefore:

Use Pythagorean theorem:
3 - 2 + x + 436 123/157 =
1 + x + 436 123/157 =
437 123/157 + x =
68732/157 + x
The entire trip will take 6 days.
(Encircle this answer, as said on the directions)
Step-by-step explanation:
We know that the first three days of the trip, we traveled 1380 miles.
Find the UNIT RATE of MILES PER day:
1380/3 = 460
Unit rate = 460 miles per day
If we were to drive at this (460 mi per day) rate EACH day and the whole journey takes 2760 miles across the country.
FInd the NUMBER of DAYS of the ENTIRE TRIP:
2760/460 = 6
It will take us 6 days to drive to the destination.
Prime numbers are numbers that only have a factor of one and its self.