3 years ago

For what values of a are v = a i − j + k and w = a i + a j − 3 k perpendicular? give exact values.

1 answer:

3 0

The vectors are perpendicular when their dot product is zero. That is
.. a^2 -a -3 = 0
.. (a -1/2)^2 -13/4 = 0
.. a = (1 ±√13)/2

You might be interested in

What’s the equation?

Eva8 [605]

So its 45 for every visit so your x is the amount of visitsso 45x plus 25 each hour you could represent with a h so 25h
The question is asking you to write and solve an equation that includes 2 different sites (45*2) and how many hours itd take to achive 810 so 810 would be on the other side of your eqaul sign

4 0

4 years ago

How many eighths make a quarter

Marianna [84]

Answer:

Two Eighths

Step-by-step explanation:

One eighth is one part of eight equal sections. Two eighths is one quarter

6 0

2 years ago

Math experts please help

Licemer1 [7]

Answer:

The answer is 64

Step-by-step explanation

Lines JK and HI are congruent therefore making the 60 degree angle on line JK can also be used to find the rest of triangle <HAI, and triangles always add up to 180 degrees

8 0

3 years ago

Three times the difference of four times a number n and seven is no more than one

Sindrei [870]

Answer:

3x-4x7

Step-by-step explanation:

8 0

3 years ago

94% is 80% of what?

Roman55 [17]

<span>94 is 117.5% of 80 is your answer</span>

8 0

3 years ago