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
andreyandreev [35.5K]
2 years ago
11

Find the value of each variable. Line l is a tangent.

Mathematics
1 answer:
ss7ja [257]2 years ago
3 0

Answer:

sorry I don't know

Step-by-step explanation:

sorry

You might be interested in
Alicia's brother is three years younger than twice her age. The sum of their ages is 24. How old is Alicia?
Alborosie
9 because 24 divided by 2 is 12 and 12 subtracted by 3 is 9
5 0
3 years ago
This is a geometry question, i need something quickly :)
Marysya12 [62]

Answer:

hope it helps mark me brainlieast!

Step-by-step explanation:

<em>For triangle ABC with sides  a,b,c  labeled in the usual way, </em>

<em> </em>

<em>c2=a2+b2−2abcosC  </em>

<em> </em>

<em>We can easily solve for angle  C . </em>

<em> </em>

<em>2abcosC=a2+b2−c2  </em>

<em> </em>

<em>cosC=a2+b2−c22ab  </em>

<em> </em>

<em>C=arccosa2+b2−c22ab  </em>

<em> </em>

<em>That’s the formula for getting the angle of a triangle from its sides. </em>

<em> </em>

<em>The Law of Cosines has no exceptions and ambiguities, unlike many other trig formulas. Each possible value for a cosine maps uniquely to a triangle angle, and vice versa, a true bijection between cosines and triangle angles. Increasing cosines corresponds to smaller angles. </em>

<em> </em>

<em>−1≤cosC≤1  </em>

<em> </em>

<em>0∘≤C≤180∘  </em>

<em> </em>

<em>We needed to include the degenerate triangle angles,  0∘  and  180∘,  among the triangle angles to capture the full range of the cosine. Degenerate triangles aren’t triangles, but they do correspond to a valid configuration of three points, namely three collinear points. </em>

<em> </em>

<em>The Law of Cosines, together with  sin2θ+cos2θ=1 , is all we need to derive most of trigonometry.  C=90∘  gives the Pythagorean Theorem;  C=0  and  C=180∘  give the foundational but often unnamed Segment Addition Theorem, and the Law of Sines is in there as well, which I’ll leave for you to find, just a few steps from  cosC=  … above. (Hint: the Law of Cosines applies to all three angles in a triangle.) </em>

<em> </em>

<em>The Triangle Angle Sum Theorem,  A+B+C=180∘ , is a bit hard to tease out. Substituting the Law of Sines into the Law of Cosines we get the very cool </em>

<em> </em>

<em>2sinAsinBcosC=sin2A+sin2B−sin2C  </em>

<em> </em>

<em>Showing that’s the same as  A+B+C=180∘  is a challenge I’ll leave for you. </em>

<em> </em>

<em>In Rational Trigonometry instead of angle we use spreads, squared sines, and the squared form of the formula we just found is the Triple Spread Formula, </em>

<em> </em>

<em>4sin2Asin2B(1−sin2C)=(sin2A+sin2B−sin2C)2  </em>

<em> </em>

<em>true precisely when  ±A±B±C=180∘k , integer  k,  for some  k  and combination of signs. </em>

<em> </em>

<em>This is written in RT in an inverted notation, for triangle  abc  with vertices little  a,b,c  which we conflate with spreads  a,b,c,  </em>

<em> </em>

<em>(a+b−c)2=4ab(1−c)  </em>

<em> </em>

<em>Very tidy. It’s an often challenging third degree equation to find the spreads corresponding to angles that add to  180∘  or zero, but it’s a whole lot cleaner than the trip through the transcendental tunnel and back, which almost inevitably forces approximation.</em>

6 0
3 years ago
13.On many multiple-choice tests, 1 point is given for each correct
lana [24]
C is the answer I believe

Hoped it helped
7 0
3 years ago
Using fluorescent imaging techniques, researchers observed that the position of binding sites on HIV peptides is approximately N
konstantin123 [22]

Answer:

The values is  

Step-by-step explanation:

From the question we are told that

  The population mean is  \mu  =  2.45

    The  standard deviation is  \sigma  = 0.35 \ mi

     The random value is  x =   2.03

The standardized score for a binding site position of 2.03 microns is mathematically represented as

       z-score  =  \frac{x -  \mu}{ \sigma }

=>      z-score  =  \frac{2.03 -  2.45}{ 0.35}

=>    z-score  =  -1.2

7 0
3 years ago
What is the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81?
Marizza181 [45]

Answer: d. 1.3333

Step-by-step explanation:

We know that the standard error of a sampling distribution is given by :-

S.E.=\dfrac{\sigma}{\sqrt{n}}

, where \sigma = Population standard deviation.

n= Sample size.

AS per given , we have

\sigma =12

n=81

Then, the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81 will be :-

S.E.=\dfrac{12}{\sqrt{81}}

=\dfrac{12}{\sqrt{9^2}}=\dfrac{12}{9}\\\\=\dfrac{4}{3}\\\\\approx1.3333

Hence, the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81 is 1.3333.

Thus the correct answer is d. 1.3333 .

6 0
3 years ago
Other questions:
  • Any thoughts im really confused on it
    5·1 answer
  • Which point is the solution to the following system of equations? x2 + y2 = 13 2x - y = 4
    8·2 answers
  • What means the same as 65?
    11·1 answer
  • DO IT AND YOU GET 50 POINTS BUT IF YOU DO BOTH PAGES YOU GET BRAINLEYIST AWNSER.
    15·2 answers
  • What is 3/10 as a percent
    14·2 answers
  • What is the range of the function shown in this table?<br> х 3 4 5 6 y 4 4 2 5
    6·1 answer
  • The coordinates (12.6) (12:10) (18.6) and (18.10) will be the comers of the floor for the sound
    6·1 answer
  • Drag and drop the terms that match each expression
    5·1 answer
  • In the first two hockey games of the year, Rodayo played 1 1/2 periods and 1 3/4 periods. How many periods in all did he play? P
    7·2 answers
  • Which is the graph of f(x)=√x?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!