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
dolphi86 [110]
3 years ago
7

A=14cm b=9cm c=6cm law of cosines

Mathematics
1 answer:
Tanzania [10]3 years ago
3 0
A^2= b^2+c^2 - 2bc•cosA

14^2= 9^2 + 6^2 -2x9x6xCosA
196= 81 + 36 - 108xCosA
196- 117= 108CosA
79/108= cos A
0.7315= cosA
A= cos^-1(0.7315)
A= 42.98

SineA/a=sineB/b= sineC/c

Sin42.98/14 = sineB/9
B = sin^-1((9•sin42.98)/14)
B= 25.99

C= 180-(25.99+ 42.98)
C= 111.03
You might be interested in
A plot of land has an area of 33.75 square feet. Jackson wants to put a 4-foot by 4-foot shed on the land. He can only do this i
Semenov [28]
The area of a trapezoid is
A = (1/2) h (b1 + b2)
where
h is the height
b1 is length of base 1
b2 is the length of base 2

We are given with the area and assuming that the trapezoid is isosceles, the length of base 1 is
b1 = 4 ft
If the height of the trapezoid is 4.5 feet, it ensures that the shed will fit inside the trapezoid patch of land. Therefore, the height of the trapezoid is 4.5 feet.
4 0
3 years ago
Read 2 more answers
Solve the equation below 5 - 1/2x = 5/8x + 2
Vanyuwa [196]
X = 8/3 

I hope this helped!
4 0
3 years ago
Read 2 more answers
What is 9,846,000,000,000 expressed in scientific notation?
AysviL [449]

Answer:

9.846 × 10¹²

Step-by-step explanation:

You didn't give the powers but that is the answer

5 0
3 years ago
Read 2 more answers
The product of a number and 10, increased by 1
Alexxandr [17]

Answer:

10x+1

Step-by-step explanation:

5 0
2 years ago
A sample of 1000 college students at NC State University were randomly selected for a survey. Among the survey participants, 102
cupoosta [38]

Answer:

The upper endpoint of the 99% confidence interval for population proportion is 0.13.

Step-by-step explanation:

The confidence interval for population proportion is:

CI=\hat p\pm z_{\alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n}}

<u>Given:</u>

<em>n</em> = 1000

\hat p = 0.102

z_{\alpha /2}=z_{0.01/2}=z_{0.005}=2.58

*Use the standard normal table for the critical value.

Compute the 99% confidence interval for population proportion as follows:

CI=\hat p\pm z_{\alpha /2}\sqrt{\frac{\hat p(1-\hat p)}{n}}\\=0.102\pm 2.58\times\sqrt{\frac{0.102(1-0.102)}{1000}}\\=0.102\pm0.0248\\=(0.0772, 0.1268)\\\approx (0.08, 0.13)

Thus, the upper limit of the 99% confidence interval for population proportion is 0.13.

6 0
2 years ago
Other questions:
  • Factor the trinomial:<br> 5x^2+42x+49
    8·1 answer
  • Using approciate properties find -4/7*3/5+4/7*-1/5+2/5*-4/5
    6·1 answer
  • Jerome solved the equation 1
    10·2 answers
  • Find the probability that a point in the circle chosen at random lies in the shaded region
    7·1 answer
  • A hula hoop has a three foot diameter how far will it travel in 6 revolution
    10·2 answers
  • HELP ME PLEASE !
    13·1 answer
  • Find the sum of these polynomials. (x^2 - x + 7) + (9x^2 + 6)
    10·1 answer
  • Find the lateral surface area​
    15·1 answer
  • Somebody help hurry ASAP
    6·1 answer
  • TIMED TEST WILL GIVE BRAINLIEST
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!