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
Nonamiya [84]
4 years ago
5

Please help using law of cosines!

Mathematics
1 answer:
Tamiku [17]4 years ago
6 0

Answer:

∠ A ≈ 48°

Step-by-step explanation:

Using the Cosine rule to find an angle

cosA = \frac{b^2+c^2-a^2}{2bc}

with a = 10, b = 13 and c = 11

cosA = \frac{13^2+11^2-10^2}{2(13)(11)}

         = \frac{169+121-100}{286}

         = \frac{190}{286} , thus

A = cos^{-1} ( \frac{190}{286} ) ≈ 48° ( to the nearest degree )

You might be interested in
HELP FOR BRAINIEST AND 50 POINTS
motikmotik
X - speed of the current
40+x - speed with current 
40-x - speed against current

t-time
(40+x)*t=100
(40-x)*t=60

           40t+xt=100
 <span>  +      40t-xt = 60
</span>           80t      =160
                t      = 2

40t+xt=100,   
40*2+2x=100
80+2x=100
2x=100-80
2x=20
x=10 mi/h

10 mi/h speed of the current.


7 0
4 years ago
Read 2 more answers
Write 58 as a percent and as a decimal<br><br> The answers 62.5 and 62.5%
IrinaK [193]

Answer:

Both Are Correct!

Step-by-step explanation:

As you can see, both of these answers are correct. The first answer is just a decimal (which is correct). The second choice has a decimal(62.5%). (Which is also correct)

Hope this helps~~

Yours Truely, TheAnimeCatUwU

3 0
3 years ago
PLEASE HELP!! LMNP is rotated 90° clockwise around the origin. What are the coordinates of M’
lubasha [3.4K]

Answer:

The answer is "(4, -5)".

Step-by-step explanation:

Please find the complete question in the attached file.

In the given image file when we rotate it to 90 degrees clockwise so the value as the rule is (x, y) \longrightarrow (y, -x)

Putting the value in x = 5 and y = 4 then:

(5, 4) \longrightarrow (4, -5)

5 0
3 years ago
How do I find the value ?
ipn [44]
Value of what buddy?
5 0
3 years ago
Read 2 more answers
Which decimal equals the fraction 3/8?
Kaylis [27]

Answer:

0.375

Step-by-step explanation:

3 divided by 8 is 0.375

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the quadratic equation for this graph.
    5·1 answer
  • What’s the correct answer for this?
    14·2 answers
  • Find missing probability ​
    5·1 answer
  • I did the first one but can you help me with the second one plz??
    14·1 answer
  • Generate a plan and describe the steps needed to solve the equation. 34 = –(m + 3)
    12·2 answers
  • Please help urgent !!!
    10·1 answer
  • Find the value of x.
    5·2 answers
  • The solution to a system of two linear inequalities in two variables cannot be:
    6·1 answer
  • Surface Area or
    11·1 answer
  • Which of Talia’s steps is incorrect?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!