1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mekhanik [1.2K]
3 years ago
11

Determine whether the statement is true or false. If it is true, explain why. If it is false, explain why or give an example tha

t disaproves the statement.
The dot product of parallel vectors is zero,
Mathematics
1 answer:
frosja888 [35]3 years ago
5 0

Answer:

False

Step-by-step explanation:

the <u>dot product</u> between two vectors A and B is:

A·B=ABcos\theta

where \theta is the angle between the vectors, if they are parallel, this angle is zero. so  \theta=0

and so the dot product is:

A·B =ABcos(0)

and since  cos (0)=1

the dot product is equal to

A·B=AB

The dot product of parallel vectors is NOT zero

You might be interested in
(WILL GIVE BRAINLIEST) Solve for x.
Oksanka [162]

Answer:

−2(−9x+5)−4x=2(x−5)−4

Step 1: Simplify both sides of the equation.

−2(−9x+5)−4x=2(x−5)−4

(−2)(−9x)+(−2)(5)+−4x=(2)(x)+(2)(−5)+−4(Distribute)

18x+−10+−4x=2x+−10+−4

(18x+−4x)+(−10)=(2x)+(−10+−4)(Combine Like Terms)

14x+−10=2x+−14

14x−10=2x−14

Step 2: Subtract 2x from both sides.

14x−10−2x=2x−14−2x

12x−10=−14

Step 3: Add 10 to both sides.

12x−10+10=−14+10

12x=−4

Step 4: Divide both sides by 12.

12x

12

=

−4

12

x= -1/3

Step-by-step explanation:

Good luck! Hope this helps! <3

3 0
2 years ago
Read 2 more answers
What is the solution of the system? Use elimination. <br> 3x - 4y = 9<br> -3x + 2y = 9
densk [106]
You add two equations together to eliminate a variable. This particular problem is nice, because it's already setup to eliminate X.

3x - 4y = 9
<span>-3x + 2y = 9
</span>
When we add these two together, 3x - 3x cancels each other out, leaving us with 0x, or nothing.

We continue with -4y + 2y (leaves us with -2y) and 9+9 (18).

-2y = 18

18/-2 = -9.

Now we have y = -9, and we can go back into the problems to solve for x.

<span>3x - 4(-9) = 9
</span>
3x + 36 = 9.

3x = -27

x = -9.

Confirm with the final equation:

-3(-9) + 2(-9) = 9
27 - 18 = 9
9 = 9 --- Confirmed.

6 0
3 years ago
Read 2 more answers
Help its timed 12 pts​
Marta_Voda [28]

Answer:

A

Step-by-step explanation:

I think your right!

5 0
1 year ago
Read 2 more answers
What is the slope of c=3.95p
Vladimir79 [104]
The answer is m=3.95
8 0
3 years ago
At the mall, Leona bought a T-shirt and a book for a total of $34. The book cost $12. How much did the T-shirt cost?
wolverine [178]

Answer:

a. the cost of the t-shirt

b. x+12=34

c. x=22

d. t-shirt cost 22$

7 0
3 years ago
Read 2 more answers
Other questions:
  • A survey conducted by the American Automobile Association showed that a family of four spends an average of $215.60 per day whil
    14·1 answer
  • A parallelogram has a base of length x + 7 and a height of x + 2 and has an area of 50 square units. find the base and height of
    11·1 answer
  • 32 equals 4 (x plus 40
    5·1 answer
  • Current year $325,000 preceding year 250,000 ​ what is the percentage increase in sales from the preceding year to the current y
    11·1 answer
  • Help me with this question please, giving 15 points.
    5·1 answer
  • What is the slope of the line through (-4,2) (3,-3)
    15·2 answers
  • Please help me! I will give you Brainlist if you get it right!​
    11·1 answer
  • 15.) Determine if the two parallelograms are<br> similar. Explain your reasoning.
    9·1 answer
  • Please help me ASAP!!<br> Thx
    15·1 answer
  • Help i dont know what to do here :|
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!