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Let u= (5,-12) and c= -3.What is ||cu||?

A: 21

B: 51

C: 39

D: -39​

Respuesta :

lialouna

Answer:

CU=-3(5,-12)

CU=36-15

CU=21

The answer is A=21

GrimMxReapeR

Answer:

[tex]=21[/tex]

Correct option is A

Step-by-step explanation:

[tex]-3\left(5-12\right)\\Follow\:the\:PEMDAS\:order\:of\:operations\\\mathrm{Calculate\:within\:parentheses}\:\left(5-12\right)\::\quad -7\\5-12=-7\\=-3\left(-7\right)\\\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:-3\left(-7\right)\::\quad 21\\-3\left(-7\right)\\\mathrm{Apply\:rule\:}-a\cdot \left(-b\right)\:=\:a\cdot \:b\\-3\left(-7\right)=3\cdot \:7=21\\=21[/tex]

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