# Chapter 12 - Matrices - 12-6 Vectors - Practice and Problem-Solving Exercises - Page 813: 29

The vectors are not normal to each other.

#### Work Step by Step

Two vectors are normal to each other if their dot product is zero. Test: $$\langle8,-4\rangle\cdot\langle -2,4\rangle=(8)(-2)+(-4)(4)=-16-16=-32\neq0.$$ The vectors are not normal to each other.

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