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
ASHA 777 [7]
3 years ago
6

Find a · b. |a| = 60, |b| = 30, the angle between a and b is 3π/4.

Mathematics
1 answer:
Delvig [45]3 years ago
8 0
The dot product is used to determine the magnitude of the resultant vector of two component vectors. It is expressed as a·b. It does not literally mean that you multiply their values. Instead, you multiply their matrices. However, since we cannot find matrices, let's just find the resultant vector through theorems involving triangles. By cosine law:

R = √[a² + b² - 2abcos(3π/4)]
R = √[60² + 30² - 2*60*30*cos(3π/4)]
R = 83.94

Thus, a·b = 83.94
You might be interested in
The graph shows the relationship between hours spent on video games and hours spent on homework last week for students in Joyce'
Lady bird [3.3K]
Answer:
the answer is b
Step-by-step explanation:
khan academy
6 0
2 years ago
There are two factors of -36 such that one factor is 11 less than half of the other factor choose all the pairs of these factors
Amanda [17]

Answer with explanation:

Factors of  -36 are

      =\pm 1, \pm 2,\pm 3,\pm 4, \pm 6, \pm 9, \pm 12, \pm 18, \pm 36

It is given that , among the factors of , -36 , one factor is 11 less than half of the other factor.

If you will take,  =\pm 1,\pm 3,\pm 4, \pm 9,, then you can find such pairs.

Pairs are= (3,-4), (9, -1),(-1, -6),

7 0
3 years ago
Michael walked 30 meters in 20 seconds how many meters does he walk per second
Kipish [7]

Answer:

1.5 m/s or 1.5 meters per second

Step-by-step explanation:

Distance/Time=Speed

30m/20s= 1.5 m/s or 1.5 meters per second

6 0
3 years ago
Read 2 more answers
the pool at the apartment is 30 feet long 20 feet wide and five feet deep it has been filled to 4 feet how many more cubic inche
pickupchik [31]

Answer:

600 cubic feet

Step-by-step explanation:

6 0
3 years ago
8(6k+6)=-3k-3. Help please
Sphinxa [80]

Answer:

Step-by-step explanation:

48k+48=-3k-3

48k+45=-3k

-51k=-3

solving for k

.0588 or .059

7 0
3 years ago
Read 2 more answers
Other questions:
  • The figure shows the elliptical orbit of Mercury, whose minimum distance to the Sun is 29 million miles and whose maximum distan
    5·1 answer
  • What is one way to find the total cost of a pair of shoes for $57 with a sales tax of 2%?
    10·1 answer
  • A 80-milliliter solution of a fabric dye contains 4 ml of hydrogen peroxide. What is the percent concentration of the hydrogen p
    5·1 answer
  • 985776448-495847586993 <br><br><br> Not random. acutaly question.
    14·2 answers
  • For a triangle, m&lt;1 =75 and m&lt;3 =40 what does m&lt;2 =?​
    12·1 answer
  • -12x4m8n 6x5m-10n-6​
    15·2 answers
  • What is 5 plus 5<br><img src="https://tex.z-dn.net/?f=5%20%2B%205" id="TexFormula1" title="5 + 5" alt="5 + 5" align="absmiddle"
    12·2 answers
  • When using the formula P + 1 you are looking for
    9·1 answer
  • Which point on the number line best represents √67?
    12·1 answer
  • I need help with the area and perimeter
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!