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A lift in an office block has stopped at a restaurant on one of the floors.Call this floor zero . What floors does it stop at on the following sequence of journeys? Write each answer as either a positive or a negative number.
A) up 8 floors
B) then down 17 floors
C) then down 12 floors
D) then up 20 floors
E) then down 14 floors


Sagot :

Answer:

- 15

Step-by-step explanation:

Floor zero = 0

Up 8 floors = 0 + 8 = 8

then down 17 floors = 8 - 17 = -9

then down 12 floors = -9 - 12 = -21

then up 20 floors = -21 + 20 = -1

then down 14 floors = -1 - 14 = -15