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
inna [77]
4 years ago
6

Law of cosines: a2 = b2 + c2 – 2bccos(A) What is the value of n to the nearest whole number? 18 22 29 41

Mathematics
2 answers:
nalin [4]4 years ago
4 0
We know that
applying the law of cosines
a² = b²+ c²<span> – 2*b*c*cos(A)
</span>
in this problem
a=?
b=20
c=9
A=90°
so
a² = b²+ c² – 2*b*c*cos(A)
but
cos (A)=0
a² = b²+ c²-----> 20²+9²----> a²=400+81----> a²=481-----> a=√481
a=21.93-----> a=22

the answer is
22

vampirchik [111]4 years ago
3 0

B. 22

Law of cosines: a2 = b2 + c2 – 2bccos(A)

You might be interested in
PLEASE HELP ME I HAVE A MATH TEST DUE TODAY AND THIS IS THE LAST QUESTION!!!! "The public library has volunteers shelve books af
liubo4ka [24]

Answer:

about 7  books per minute

Step-by-step explanation:

4 0
3 years ago
Which expression corresponds to this graph?
d1i1m1o1n [39]

Answer:

C

Step-by-step explanation:

The expression is x>55 and 55 isn't included

7 0
3 years ago
3. Suppose you pay $24 for a pair of shoes that has been discounted 20%. What is the original price of the shoes? Show how you i
elixir [45]
Discounted price = 24
discount rate = 20%

When an object is sold at a discount.
You can simply multiply the original price by the discount rate to get the value of the discount.

 Original Price * Discount Rate = Value of the discount

Then, you subtract the value of the discount from the Original price to get the discount price

Original Price - Value of the discount = discounted price

Remember: The discount price can also be arrived at by multiplying the Original price with the difference of 100% and the discount rate, in its decimal form.

Original price * (100%-discount rate)/100 = Discount Price

Using the latest formula, we can compute for the original price by dividing the discount price by the difference of 100% and the discount rate, in its decimal form.

Original Price = Discount Price / (100%-discount rate)/100

Original Price = 24 / (100%-20%)/100
                       = 24 / 0.80
Original Price = 30

Discount Value = 30 * 20%/100%
                          = 30 * 0.20
Discount Value = 6

Discount Price = 30 - 6
Discount Price = 24
3 0
3 years ago
Determine the relationship between the two triangles and whether or not they can be proven to be congruent.
forsale [732]

Answer:

The answer would be A

Step-by-step explanation:

Both congruent sides are pairs

8 0
3 years ago
Read 2 more answers
What is the answer for this cause the answer I put is incorrect
maw [93]

The answer would be 59.

Because the first point is (0, 59) I am positive on this answer. Hope this helps!

6 0
3 years ago
Other questions:
  • The owner of a greenhouse and nursery is considering whether to spend $6,000 to acquire the licensing rights to grow a new varie
    7·1 answer
  • I need help..................
    13·2 answers
  • Can someone please help me with this? Thanks
    10·1 answer
  • Minim<br> w<br> Original price: $40; Markup: 15%<br> The retail price is $
    15·1 answer
  • A corporation
    13·1 answer
  • How to solve 4x-3y=22,2x-y=10
    14·2 answers
  • In the last year, the population of Japan had a decay rate of 0.17% and decreased to 127,484,450. If this rate continues, what w
    5·2 answers
  • Indicate whether the functions an exponential growth or decay
    5·1 answer
  • Which of the following is a factor of 6x^3 + 6?
    14·1 answer
  • WILL GIVE BRAINLIEST FOR CORRECT ANSWER Find the area of the shaded region only ( the purple part) :)
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!