stillslump stillslump

22-01-2021
Mathematics

contestada

A plane travels south for 120 km. The plane then travels north for 45 km.

If north is taken as the positive direction, what is the displacement of the plane?

a. 75 km
b. –75 km
c. 165 km
d. –165 km

Respuesta :

atashinchiii atashinchiii

22-01-2021

Answer:

b. -75

Step-by-step explanation:

It is already stated in the problem that north direction is positive. Hence, south is negative.
We take 120km south to be -120km.
Then, travelling north by 45km.
We then add the two: -120km + 45km = -75km

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