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
Elenna [48]
3 years ago
6

IS ANYONE GOOD IN LAW OF COSINES..If so ill give brainlest​

Mathematics
1 answer:
marysya [2.9K]3 years ago
6 0

Answer:

X=70.5^o

Step-by-step explanation:

we know that

The formula of the law of cosines is equal to

c^2=a^2+b^2-2(a)(b)cos(C)

where

a, b and c are sides. C is the angle opposite side c

In this context

The formula to calculate the measure of angle X is equal to

YZ^2=XZ^2+XY^2-2(XZ)(XY)cos(X)

substitute the given values

22^2=20^2+18^2-2(20)(18)cos(X)

solve for cos(X)

484=400+324-(720)cos(X)

484=724-(720)cos(X)

(720)cos(X)=724-484

(720)cos(X)=240

cos(X)=240/720

X=cos^{-1}(240/720)=70.5^o

You might be interested in
A dog uses 30 lbs of dog food per day. How many pounds are used in a year?
Ludmilka [50]
To solve this we would do 30×365

We would do this because each day the dog 30lbs

So we have the equation y=30x
Where y= total amount of dog food
And x= number of days

In a year there are 365 days typically, so we do 30×365

30×365=10,950

In one year 10,950 lbs of dog food are used
6 0
4 years ago
I need help solving for x
Vlada [557]

Answer:

7.5

Step-by-step explanation:

draw the triangles separately then write a fraction for the small one x/6 and 10/8 then to get rid of the 6 to get x by itself you multiply by 6 to get X and for the other side you do 10/8 then multiply 1.25 times 6 to get 7.5

please add a thanks and a brainliest

hope this helped

6 0
3 years ago
Which graph shows the solution to the following inequality. -5c+2<27
bogdanovich [222]

Answer:

c > -5

Step-by-step explanation:

-5c + 2 < 27    

      - 2    - 2         Subtract 2 from both sides

-5c < 25               Divide both sides by -5 and flip the sign

c > -5

I graphed the inequality on the graph below.

If this answer is correct, please make me Brainliest!

8 0
3 years ago
I need help i don’t get it
Anastaziya [24]
The answer is 4337 ÷ 9
8 0
3 years ago
Read 2 more answers
Tissues of living organisms consist primarily of organic compounds; that is, they contain carbon molecules known as proteins, ca
Marianna [84]
<span>A healthy human body is approximately 18% carbon, so to determine how many pounds of carbon a 200lb body contains, compute 200lbs X 0.18 = 36 pounds. To convert 36lbs to kilograms, multiply by the conversion factor 0.454. Therefore, 36lbs X 0.454 = 16.344 kg.</span>
6 0
3 years ago
Read 2 more answers
Other questions:
  • What is x when 5(2x+1)=10x
    5·1 answer
  • Which equation in point-slope form describes the line through points (4, –4) and (1, 2)?
    14·1 answer
  • The back of Tom's property is a creek. Tom would like to enclose a rectangular area, using the creek as one side and fencing for
    6·1 answer
  • Evaluate: 2(6+4) – 3(5)
    12·2 answers
  • Jason and Eddy are traveling from Jacksonville to Miami, which is a distance of 382 miles. According to the American Automobile
    12·1 answer
  • What fraction is equal to .13
    11·1 answer
  • The following data are the distances between 20 retail stores and a large distribution center. The distances are in miles.
    11·1 answer
  • Hii please help asap ill give brainliest thanks
    8·2 answers
  • PLEASE NO FILES OR LINKS
    5·2 answers
  • Please help!! due in 2 hours!!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!