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
kumpel [21]
3 years ago
12

Once again co sines . Please help me and include explanation with a clear answer

Mathematics
1 answer:
vladimir1956 [14]3 years ago
8 0

Using the law os cosines formula b^2 = a^2 + c^2 - 2*a*c*cos(B)

a = 17, b = 8, c = 16

8^2 = 17^2 + 16^2 - 2*17*16* cos(B)

64 = 289 + 256 - 544 * cos(B)

544*cos(B) = 289 + 256 - 64

544 * cos(B) = 481

cos (B) = 481/544

B = arccos(481/544)

B = 27.8 degrees

You might be interested in
Choose the linear inequality that describes the graph. The gray area represents the shaded region.
jek_recluse [69]

Answer:

2x + 3y ≥ 5

Step-by-step explanation:

See the graph attached.

The bold straight line passes through the points (1,1) and (4,-1).

Therefore, the equation of the straight line will be  

\frac{y + 1}{- 1 - 1} = \frac{x - 4}{4 - 1}

⇒ 3(y + 1) = - 2(x - 4)

⇒ 3y + 3 = - 2x + 8

⇒ 2x + 3y = 5 ............. (1)

Now, the shaded region i.e. the solution to the inequality does not include the origin(0,0).

So, putting x = 0 and y = 0 in the equation (1) we get, 0 < 5

Therefore, the inequality equation is 2x + 3y ≥ 5 (Answer)

6 0
3 years ago
Solve by using the measurements ∠PQR = 90°, ∠QRP = 80°, and r = 15. Round measures of sides to the nearest tenth and measures of
valkas [14]

Good evening ,

___________________

Step-by-step explanation:

Look at the photo below for the answer.

:)

5 0
3 years ago
Read 2 more answers
436.8 divided by 62.08
Readme [11.4K]

Answer:

7.03 if your rounding to the nearest tenth then its 7

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
to cover a rectangular region of her yard penny needs at least 170.5 square feet of sod. the length of the region is 15.5 feet.
pshichka [43]
To cover at least 170.5 sq.ft. the width must be at least 11 feet
W=170.5sq.ft / 15.5 ft = 11ft
7 0
3 years ago
What is 2 1/2 /1/3 ?
DanielleElmas [232]

Answer:

15/2

Step-by-step explanation:

My interpretation of your math expression is "2  1/2 divided by 1/3."

I prefer to write this as:

 5        1

----- ÷ -----

 2         3

which is equivalent to:

 5        3

----- * ----- = 15/2

 2        1

5 0
3 years ago
Other questions:
  • How to solve 10 = 1\3( x - 15 )
    9·1 answer
  • ms. bastian and ms.brown are trying to get the most step in this week. ms.bastian walks 11219 steps in 12 hours. ms.brown walks
    5·1 answer
  • What is the difference between dash and hyphen
    5·1 answer
  • How is 88 a solution to 18x11
    9·1 answer
  • Find the area of a regular hexagon with side length 10 m. Round to the nearest tenth.​
    11·1 answer
  • Employee A gets paid $13/hour. He got paid
    14·1 answer
  • Three manufacturers of plastic products a,b and c received an order to make 1950 plastic filters in the ratio 7:8:11.
    8·1 answer
  • Please helpp im really bad at math<br> simplify (7v-2)^2
    12·2 answers
  • If the graph of the second equation in the system passes through the points (-12,20) and (4,12), which statement is true?
    13·1 answer
  • 17-5(2×-9)=-(-6×+10)+4<br><br><br><br><br> Please help me with this problem
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!