pinkiepink57 pinkiepink57
  • 03-03-2022
  • Mathematics
contestada

Given the vectors v=3i-2j and w=-i+5j, find v · w.

Respuesta :

linandrew41
linandrew41 linandrew41
  • 03-03-2022

v * w = (3i - 2j) *(-i + 5j) = 3(-1) + (-2)(5) = -3 + -10 = -13

Hope that helps!

Answer Link
ganjilaya2019
ganjilaya2019 ganjilaya2019
  • 03-03-2022

Answer:

v.w = -13

Step-by-step explanation:

v.w = (3i - 2j).(-i + 5j) = 3 × -1 × i.i + 3 × 5 × i.j + -2×-1 × j.i + -2×5 × j.j

i.i = j.j = 1 , i.j = j.i = 0

→

v.w = -3 - 10 = -13

Answer Link

Otras preguntas

The replacer parameter of the stringify method accepts a/an ______________ or an array.
what is the unit for work
Please please help me
This figure is made up of a triangle and a semicircle. What is the area of the figure? Use 3.14 for π . Enter your answer, as a decimal, in the box. units²
Will mark BRAINLIEST! Help me!
PLEASE HELP 14 POINTS
help me with the correct answer only plz
An entrepreneur is a _____. new business that creates a product that raises the standard of living person who administers career tests person who takes a risk t
Lightwaves travel from the air into a lens made of glass. Their velocity decreases as they enter the glass. How does this affect the frequency and wavelength of
For f(x) = √x-3 find f(f^-1(4))