natescheffel natescheffel
  • 25-04-2019
  • Mathematics
contestada

Find a.b if a=(2,-8) and b=(-1,4)

Respuesta :

adhanti3peek
adhanti3peek adhanti3peek
  • 26-04-2019

a = negative 16 and b = negative 4

Answer Link
slicergiza slicergiza
  • 25-06-2019

Answer:

The value of a.b is -34.

Step-by-step explanation:

Since, the dot product of two vectors [tex]A(a_1,a_2)[/tex] and [tex]B(b_1,b_2)[/tex] is,

[tex]A.B=a_1b_1+a_2b_2[/tex]

Given vectors,

a=(2,-8) and b=(-1,4),

Thus,  the dot product of vectors a and b,

[tex]a.b = 2 \times (-1) + (-8)\times (4) = -2 - 32 = - 34[/tex]

Answer Link

Otras preguntas

solve: 5/6x-2x+4/3=5/3
Traveling at 65 mph how many feet can you travel in 22 minutes?
What is the subject and verb in this sentence? Listen carefully to all directions.
If a dune Buggy is traveling for 20 seconds at a speed of 8.5m/s how do I calculate the unknown quantities
Count by tens and ones to find the sum of 52+34 Use the number line to show you thinking by
Solve the equation. 2x^2+7=15x
What is the subject and verb in this sentence? Listen carefully to all directions.
Traveling at 65 mph how many feet can you travel in 22 minutes?
How many political entities are in mainland South America
Portugal believed it could reach the East Indies by sailing around the tip of?