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If a vector A= -5.0x-4.0y and vector B = -3.0x+8.0y, then the magnitude of vector C= A-B is

a. 13.4
b. 12.2
c. 148
d. 7.2
e. 4.5

1 answer

-5 - -3 = -2
-4 - 8 = -12

sqrt (4 +144) = 12.2

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