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
GuDViN [60]
3 years ago
11

Which of the equations are true identities? \begin{aligned} \text{A. }&(y+6)(y-7)+42=y^2-y \\\\ \text{B. }&(x+3)(x-8)=x^

2-5x \end{aligned} A. B. ​ (y+6)(y−7)+42=y 2 −y (x+3)(x−8)=x 2 −5x ​
Mathematics
2 answers:
BaLLatris [955]3 years ago
8 0

Answer:

its only A

Step-by-step explanation:

got it from khan academy

musickatia [10]3 years ago
5 0

Answer:

Only A, the first equation is true.

Step-by-step explanation:

A. (y + 6)(y – 7) + 42 = y² + 6y –7y – 42 + 42 = y² – y. This means A is true

B. (x + 3)(X – 8) = x² + 3x – 8x – 24 = x² – 5x – 24. This means B is false.

You might be interested in
Evaluate 0.65 x 280 - 2/9 of 513
kondor19780726 [428]

Answer:

181.99956681

Step-by-step explanation:

Mark as brainliest

7 0
3 years ago
Someone that understand this can help me out?
Kryger [21]
Plug in -2 to x in the formula
So f(-2)= ((-2)+1)^2
Your answer should be: 1
7 0
2 years ago
How do you solve each system by graphing
abruzzese [7]

See the attached graph

<h2>Explanation:</h2>

Hello! Remember to write complete questions in order to get good and exact answers. Here you don't provide any system so I couldn't help you in an exact way, but in a general manner. When solving systems by graphing we just need to find the points of intersection of the graphs of the functions that built up the system.

Suppose you have the following system of linear equation:

\left\{ \begin{array}{c}y=2x+3\\3y=8x+27\end{array}\right.

yBy using graphing tools, we get the graph shown below. As you can see, the point of intersection of both lines is (-9,-15)

<h2>Learn more:</h2>

Solving systems by graphing: brainly.com/question/13799715

#LearnWithBrainly

8 0
3 years ago
Determine if the two triangles are congruent. If they are, State how you know. NO LINKS!!!! Show your work. Part 2c​
tankabanditka [31]

Answer:

2.  Not enough information

4. Congruent SAS

4. Similar, not enough information to determine congruency.

Step-by-step explanation:

2.  We only know one side and one angle are congruent,  Not enough to determine congruency

4.  We know two sides and the angle between are vertical angles and vertical angles are congruent.  SAS is how the triangles are congruent.

6.  The three angles are congruent which makes the triangles similar.  We need to know a side if they are to be congruent

7 0
2 years ago
What two numbers multiply to 20 and add up to 17
Shalnov [3]
That is not possible, since 20 has the factors of 1,2,4,5,10, and 20. None of those add up to 17, maybe your question has a mistake in it. For further questions, you can message me. Hope this helps! Please rate brainiest answer.
4 0
3 years ago
Other questions:
  • X=? i’m super lost please help!
    7·1 answer
  • This graph shows transformations between<br> f(x) = 10^x and g(x)= a •10^x
    8·1 answer
  • What is the lateral area of a rectangular prism with a base length of 16 m, a base width of 8 m, and a height of 4 m?
    13·2 answers
  • Five times the difference of twice a number and eleven is negative twenty-five. Find the number.
    11·1 answer
  • HELP ASAP !!!! I AM STUCK IN A MESS HELP !!!! Which is the correct answer !!!!
    12·2 answers
  • When reflecting a figure across the x-axis, why does the y-value always change signs?
    6·1 answer
  • A tutot earns $105 for 3 hours of tutoring. How much would she earn if she tutored for
    13·2 answers
  • Please help me I need to get this done!!!
    12·1 answer
  • Plssss help 20 points plssa<br> If K Mis the perpendicular bisector of JL, find x.<br> Plsss
    13·1 answer
  • Help me find the media, mode and the mean look at the photo and solve the puzzle
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!