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
Hitman42 [59]
2 years ago
8

Help I was absent when she taught this

Mathematics
2 answers:
lys-0071 [83]2 years ago
8 0

Step-by-step explanation:

how how how how mamamma howw

DedPeter [7]2 years ago
4 0

Answer:

b

Step-by-step explanation:

You might be interested in
I need help please!!!!!
charle [14.2K]
Obtuse angle. If wrong I’m sorry lol
5 0
3 years ago
(a) If G is a finite group of even order, show that there must be an element a = e, such that a−1 = a (b) Give an example to sho
Dahasolnce [82]

Answer:

See proof below

Step-by-step explanation:

First, notice that if a≠e and a^-1=a, then a²=e (this is an equivalent way of formulating the problem).

a) Since G has even order, |G|=2n for some positive number n. Let e be the identity element of G. Then A=G\{e} is a set with 2n-1 elements.

Now reason inductively with A by "pairing elements with its inverses":

List A as A={a1,a2,a3,...,a_(2n-1)}. If a1²=e, then we have proved the theorem.

If not, then a1^(-1)≠a1, hence a1^(-1)=aj for some j>1 (it is impossible that a^(-1)=e, since e is the only element in G such that e^(-1)=e). Reorder the elements of A in such a way that a2=a^(-1), therefore a2^(-1)=a1.

Now consider the set A\{a1,a2}={a3,a4,...,a_(2n-1)}. If a3²=e, then we have proved the theorem.

If not, then a3^(-1)≠a1, hence we can reorder this set to get a3^(-1)=a4 (it is impossible that a^(-1)∈{e,a1,a2} because inverses are unique and e^(-1)=e, a1^(-1)=a2, a2^(-1)=a1 and a3∉{e,a1,a2}.

Again, consider A\{a1,a2,a3,a4}={a5,a6,...,a_(2n-1)} and repeat this reasoning. In the k-th step, either we proved the theorem, or obtained that a_(2k-1)^(-1)=a_(2k)

After n-1 steps, if the theorem has not been proven, we end up with the set A\{a1,a2,a3,a4,...,a_(2n-3), a_(2n-2)}={a_(2n-1)}. By process of elimination, we must have that a_(2n-1)^(-1)=a_(2n-1), since this last element was not chosen from any of the previous inverses. Additionally, a_(2n1)≠e by construction. Hence, in any case, the statement holds true.

b) Consider the group (Z3,+), the integers modulo 3 with addition modulo 3. (Z3={0,1,2}). Z3 has odd order, namely |Z3|=3.

Here, e=0. Note that 1²=1+1=2≠e, and 2²=2+2=4mod3=1≠e. Therefore the conclusion of part a) does not hold

7 0
3 years ago
The Angle-Angle Similarity Postulate states that two triangles are similar if they have _________ pairs of corresponding angles
ehidna [41]

Answer: i thinks its conjointed twins

Step-by-step explanation:

my brother said it was that and hes smart so he dropped out of 8th grade

3 0
2 years ago
Read 2 more answers
Lupe played six tennis matches last weekend and won four of them. What fraction of the matches did Lupe win? A. 1/3 B. 1/2 C. 2/
Luda [366]
It is C. 2/3 because the original fraction would be 4/6, and if you simplify that, you get 2/3
8 0
3 years ago
Laws of Sine just need a way to solve this, I got kicked out of my last tutor and lost the work and can't get it back
Stels [109]

The measurement of angle A = 52 ° .

In question we need to find angle A ,

To find angle A using Law of Sines :

Law of Sine : ( a / sin A ) = ( b / sin B ) = ( c / sin C ) where a , b and c are the sides opposite to angle A , B and C resp. of a triangle .

Applying Law of Sines ,

25 / sin A = 28 / sin 62

sin A = ( 25 * sin 62 ) / 28

sin A = 0.7883

Therefore , angle A = 52 ° .

Hence , the measurement of angle A = 52 ° .

To learn more on Law of Sines follow link :

brainly.com/question/2807639

#SPJ9

4 0
1 year ago
Other questions:
  • a football gains 8 yards on their first play. they lose 12 yards on the next play.. which integers represent the two plays?
    13·2 answers
  • The data below shows the temperature of the water in a swimming pool over a two week period.
    13·1 answer
  • What is the value of 35−3m35−3m , when m = 4?
    8·1 answer
  • Empirical rule (statistics)Help please!!!
    7·1 answer
  • A small pizza costs 9 dollars and each additional topping cost 0.75 dollars
    12·2 answers
  • What is 3×584 in expanded form
    9·2 answers
  • X 2 + y 2 - 10x - 8y + 1 = 0
    8·1 answer
  • Is 56 x<br> greater than or less than 56?
    5·1 answer
  • Can somebody help me ?
    14·1 answer
  • Helppppppppppppp meeeeee
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!