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
Montano1993 [528]
3 years ago
13

Please Help, Will give Brainliest! Law Of Cosines.

Mathematics
1 answer:
stealth61 [152]3 years ago
6 0

Answer:

  B)  a = 6.7, B = 36°, C = 49°

Step-by-step explanation:

Fill in the numbers in the Law of Cosines formula to find the value of "a".

  a² = b² + c² -2bc·cos(A)

  a² = 4² +5² -2(4)(5)cos(95°) ≈ 44.4862

  a ≈ √44.4862 ≈ 6.66980

Now, the law of sines is used to find one of the remaining angles. The larger angle will be found from ...

  sin(C)/c = sin(A)/a

  sin(C) = (c/a)sin(A)

  C = arcsin(5/6.6698×sin(95°)) ≈ 48.31°

The third angle is ...

  B = 180° -A -C = 180° -95° -48.31° = 36.69°

The closest match to a = 6.7, B = 37°, C = 48° is answer choice B.

You might be interested in
On a lunch counter, there are 3 oranges, 5 apples, and 2 bananas. If 3 pieces of fruit are selected, find the probability that 1
muminat

Answer:

Probability = \frac{1}{24}

Step-by-step explanation:

Given

Oranges = 3

Apples = 5

Banana = 2

Total = 10

Required

Determine the probability of 1 orange, 1 apple and 1 banana

Since, order is not important:

Probability = P(Orange) * P(Apple) * P(Banana)

Probability = \frac{3}{10} * \frac{5}{9} * \frac{2}{8}

<em>The difference in the numerator is as a result of picking the fruit without replacement</em>

Probability = \frac{30}{720}

Probability = \frac{1}{24}

6 0
2 years ago
if an exterior angle of a triangle has a measure of 35 degrees, what is the measure of the adjacent interior angle?
Alona [7]

Answer:

145

Step-by-step explanation:

Adjacent interior angle = x

Sum of exterior angle and adjacent interior angle = 180

35 + x = 180

x = 180 - 35

x = 145

3 0
3 years ago
Read 2 more answers
{Coloring Activity!)<br> 1<br> Find the value of x.<br> (14x – 13)<br> (8x + 5)
Sloan [31]

Answer:

Step-by-step explanation: ';iystugiup8h;klu

8 0
3 years ago
Aryon has $15. He buys 2 Cokes that each cost $1.00. He also buys a
fenix001 [56]
15.00-5.00-2.00-2.00= $6.00
7 0
3 years ago
The table below models the cost, y, of using a high-efficiency washing machine and a standard washing machine over x number of y
SSSSS [86.1K]

ANSWER:

i) y = 25x + 500

ii) y = 30x + 400

iii) The washing machines would cost the same amount after 20 years of use

iv) Standard machine

Step-by-step explanation:

i)

We are to determine a straight line equation that models the cost of High-Efficiency washing machine over the years;

The first step step is to determine the slope of the line,

( change in y) / ( change in x ) = (550 - 525) / ( 2 - 1) = 25

The equation is slope-intercept form will be;

y = 25x + c

Where y is the cost of the High-Efficiency washing machine and x the number of years. To determine the y-intercept, c, we use any pair of points given in the data table;

when x = 1, y = 525

525 = 25(1) + c

c = 500

Therefore;

y = 25x + 500

ii)

The straight line equation that models the cost of Standard washing machine over the years;

Slope = (460 - 430) / (2 - 1) = 30

The equation is slope-intercept form will be;

y = 30x + c

when x = 1, y = 430

430 = 30(1) + c

c = 400

Therefore;

y = 30x + 400

Where y is the cost of the standard washing machine and x the number of years.

iii)

Given the cost functions for both machines over the number of years, we simply equate the two equations and determine the value of x when both machines would cost the same amount;

We have the cost functions;

y = 25x + 500

y = 30x + 400

Equating the two and solving for x;

25x + 500 = 30x + 400

500 - 400 = 30x - 25x

100 = 5x

x = 20

Therefore, the washing machines would cost the same amount after 20 years of use.

iv)

In order to determine which machine would be the more practical purchase if kept for 9 years we use the cost functions obtained in i) and ii)

The cost function of the High-Efficiency washing machine is;

y = 25x + 500

To determine the cost, we solve for y given x = 9

y = 25(9) + 500

y = 725

The cost function of the Standard washing machine is;

y = 30x + 400

We solve for y given x = 9

y = 30(9) + 400

y = 670

Comparing the two values obtained, the cost for the Standard washing machine is more practical.

3 0
2 years ago
Read 2 more answers
Other questions:
  • A camping leader bought the items listed in the table for his team. What is the average cost of an item in his purchase?
    10·1 answer
  • As a healthcare professional,what are the possible consequences for failing to master metric system conversion skills
    14·2 answers
  • I'll give brainliest answer
    9·1 answer
  • How to do angles like vertical and congruent
    13·2 answers
  • Emma invested $750 in an account paying an interest rate of 1.9% compounded quarterly. Assuming no deposits or withdrawals are m
    12·2 answers
  • In a group of students. 20 study Account. 21 Study mathematics 18 study history 7 study account only 10 study mathematics only 6
    8·1 answer
  • Simplify. (x 3) 4 • x -3 x -36 x 9 x 4 x -21
    14·2 answers
  • Ursula has 5 cubes with side lengths of 1/2 inch and 24 cubes with side lengths of 1/4 inch. Together, the 29 cubes could be use
    12·2 answers
  • Ashley purchased a prepaid phone card for $25. Long distance calls calls cost 19 cents a minute using this card. Ashley used her
    5·1 answer
  • Find the equation of the plane that goes through three points:
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!