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
Aliun [14]
4 years ago
7

Find the length of BC Round to the nearest hundredth.

Mathematics
2 answers:
likoan [24]4 years ago
6 0
The answer is B i just did it and teacher helped me
Zepler [3.9K]4 years ago
4 0

Answer:

a=6\ m

Step-by-step explanation:

Here,

m\angle A=18^{\circ}\\\\m\angle C=21^{\circ}\\\\AB=c=7\ m\\\\BC=a=??

Sine law-

\dfrac{\sin A}{a}=\dfrac{\sin B}{b}=\dfrac{\sin C}{c}

Putting the values,

\Rightarrow \dfrac{\sin 18}{a}=\dfrac{\sin 21}{7}

\Rightarrow a=\dfrac{\sin 18\times 7}{\sin 21}

\Rightarrow a=6\ m

You might be interested in
There are 180 school days in a year. How many days are in 5 years
labwork [276]

There are 180 school days in a year. How many school days are in 5 years?

If we know that there are 180 school days in 1 year, we can multiply 180 by 5 to get our answer of how many school days are in 5 years.

900 school days in 5 years.

5 0
3 years ago
Given F (x) -5x + 1, solve for x when f (x) = -4
AnnyKZ [126]

Answer:

X=1

Step-by-step explanation

-4x1=-5x1+1

4 0
3 years ago
Breann solved the system of equations below. What mistake did she make in her work?
s344n2d4d5 [400]
As far as i am concerned, i do not find any mistake with the answer and the procedure of the problem that has been solved by Breann. It has been done correctly. The value of "x" and "y" are absolutely correct. I hope that this will boost your confidence and help you solve problems of similar nature with absolute ease.<span />
8 0
3 years ago
Factor 7x^3+28x^2+21x
jarptica [38.1K]

Answer:

7x (x + 1 ) ( x + 3 )

Step-by-step explanation:

7x³ +28x² +21x

7x ( x² + 4x + 3 )

7x [ x² + 1x + 3x + 3 ]

7x [ x ( x + 1 ) + 3 ( x + 1 ) ]

7x (x + 1 ) ( x + 3 )

3 0
3 years ago
Write and solve a equation that represents the following:<br> A number decreased by 12 is 24.
exis [7]

Answer:

x-12=24, x=36

Step-by-step explanation:

letter X subtract 12 is 24. Add 12 to both sides, and x=36.

8 0
3 years ago
Read 2 more answers
Other questions:
  • The point A (-7,5) is reflected over the line x = -5, and then is reflected over the line x= 2. What are the coordinates of
    7·1 answer
  • Can someone answer these math questions please
    6·1 answer
  • Which expression can be used to solve 3/5 ÷ 7/10​
    12·1 answer
  • Solve the equation for the given variable x/4=6/8
    9·2 answers
  • Which of the following square roots is best represented by Point A?<br> A<br> 3<br> 4
    9·1 answer
  • 7 over radical 90 write in simplist form
    11·1 answer
  • What is the answer to this
    5·1 answer
  • If 9^(1 - x) =27^Y and x-y equals to -11 / 2 find the value of x + y​
    11·1 answer
  • What is the solution to this system of linear equations?
    12·1 answer
  • 21 points!! Help ASAP answer all the questions in the image NO websites!
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!