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
Blizzard [7]
4 years ago
14

Find a · b. |a| = 4, |b| = 7, the angle between a and b is 2π/3

Mathematics
1 answer:
galben [10]4 years ago
5 0

Answer:

-14

Step-by-step explanation:

a·b = |a|×|b|×cos(angle between them)

= 4×7×(-1/2)

= -14

You might be interested in
one seventh of 42 people ate pancakes, two thirds ate pancakes and eggs, the remaining ate eggs only. which fraction represent t
gtnhenbr [62]
(1/7)*42=6
(2/3)*42=28
6+28=34
42-34=8
8/42=4/21
your answer is 4/21
8 0
3 years ago
The scale on a drawing is 1 cm = 6 m. How many meters does a length of 5.5 centimeters on the drawing represent?
cestrela7 [59]
1*5.5=5.5, so 6*5.5=33,
so 5.5 cm is 33 m in real life
6 0
3 years ago
Read 2 more answers
2(x + 1) - 3x=? What is it?
Vera_Pavlovna [14]
2(x + 1) - 3x = 0
2x + 2 - 3x = 0
-x + 2 = 0
-x = -2
Divide -1 on both sides
x = 2
5 0
3 years ago
....................
frosja888 [35]
Well its pretty obvious that it cant be A  the answer will be E) because abc are connected and abd are as well so the answer will be e
3 0
3 years ago
Increase £55 by 37%<br> Give your answer rounded to 2 DP.
bogdanovich [222]

Answer:

75.35

Step-by-step explanation:

I hope this helped

5 0
3 years ago
Other questions:
  • Can someone please answer. It's only one question. There is a picture. Thank you!
    5·1 answer
  • What is 8 1/3 minus 2 2/3. Please show work
    8·2 answers
  • What is the answer to x + 1.2x?
    15·1 answer
  • What is the determinant of a=
    5·1 answer
  • What value for the constant, h, in the equation shown below will result inn an infinite number of solutions
    14·1 answer
  • What does this mean from the Declaration of Independence
    9·1 answer
  • AC is tangent to the circle with center at B. The measure of angle ACB is 58 degrees.
    5·2 answers
  • Someone help and please make sure it’s right
    9·2 answers
  • In a theater there are 15 chairs in the first row, each row has 3 more chairs than the previous
    8·1 answer
  • Given the diagram below , what is sin(30”)?<br><br> A. 1/2<br> B. 1/3<br> C. 1/4<br> D. 3/4
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!