kaiyiyuan1609 kaiyiyuan1609
  • 25-05-2019
  • Mathematics
contestada

Double check my Math Question?


Evaluate the dot product (2, 4) and (1, -2)



My answer comes out (2, 2), is that right?

Respuesta :

altavistard
altavistard altavistard
  • 25-05-2019

Answer:

-6

Step-by-step explanation:

You are finding the dot product of vectors <2, 4> and <1, -2>.  Recall that the dot product is a SCALAR.  In this case  <2, 4> · <1, -2> = 2(1) + 4(-2)>, or

2 - 8, or -6.  

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