Question

Boy rides bike 21 km west and 18 km north. How far is he from his starting point? Please show work

Answer 1

Step-by-step explanation:

GIVEN

boy rides 21 km west

boy rides 18 km north

TO FIND

distance from the starting point

SOLUTION

AS boy rides 21 km west and 18 km north

we can asume that it as

r = - 21i (bar). +. 18 j (bar)

r =

r = -3 ( 7 i - 6 j )

r = -3 ( √ 49 - 36 )

r = -3 ( √ 13 )

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