courtr51
courtr51
24-08-2016
Mathematics
contestada
Find a • b.
a = 4i + 3j, b = -4i + 4j
Respuesta :
caylus
caylus
24-08-2016
Hello,
I suppose a and b are vectors
and i and j unit's vectors
[tex]\vec{i}*\vec{i}=1\\ \vec{j}*\vec{j}=1\\ \vec{i}*\vec{j}=0\\ [/tex]
[tex]\vec{a}\ .\ \vec{b}=(4\vec{i}\ +3 \vec{j}).(-4\vec{i}\ +4 \vec{j})\\ =-16-3*4*0+4*4*0+12=-4[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 35+ )
Otras preguntas
The table below shows the number of marbles of different colors in a bag: Color of Marbles I Number of Marbles ------------------------------------------------
If a ball is thrown in the air with a velocity 48 ft/s, its height in feet t seconds later is given by y = 48t − 16t2. Find the average velocity for the time p
how did the union benefit from holding maryland? a. maryland had a well-trained militia and officers b. maryland had more railroads than any other state at the
The sponsor who pays for our uniforms deserves advertising at each game. Is this an essential or nonessential adjective clause?
Will an empty balloon have precisely the same apparent weight on a scale as a balloon filled with air? Explain.
Doctors who specialize in the diagnosis and treatment of the conditions of arthritis and gout are called
Richard Connell’s “The Most Dangerous Game” is a thematically rich story. What is one of the complex psychological themes that this story deals with? a.)the d
which of the following cities became the center of learning during the hellenistic age? (1 point) alexandria athens babylon persepolis
____ determines the overall lightness or darkness of an entire image.
The Ruiz family is exchanging euros for US dollars. The exchange rate is 1 euro equals 1.35261 USD. Since the Ruiz family knows that USD are stated to the neare
