Respuesta :

taymasterfan27

Answer:

Step-by-step explanation:

v = 3 (r - 1)

v = 3(- 1 - 3) <----- Here we are substituting R

v = -3 - 9 <---- Here we expanded the bracket

v = -12 <--- This is your answer, because -3 -9 is equal to -12

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