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Ksenya-84 [330]
3 years ago
9

Someone please help me serious answers only!!!!!

Mathematics
1 answer:
12345 [234]3 years ago
3 0
The answer to your question is C.
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2x-y=-6<br>3x-4y=-4<br>Solve using elimination and then substitution
Alinara [238K]
Okay, so first you are going to decide whether to solve for x or solve for y. I am going to solve for x. In order to do so, you must get x by itself.
2x-y=-6
2x=y-6[ [tex]3x-4y=-4
3x=4y-4 \\ x= \frac{4y-4}{3}
The next step is to set both equations equal to each other in order to find y.
\frac{y-\frac{y-6}{2}= \frac{4y-4}{3} \\ 3(y-6)=2(4y-4) \\ 3y-18=8y-8 \\ -10=5y \\ y=-26}{2} [/tex]

So now you know that y=-2. The next part is substitution. All you have to do is pick on of the equations and plug in the y value to get the x value.

So your answer to the question is (-4,-2). I hope I've helped you understand how to solve these types of problems. If you have any questions, don't hesitate to ask.

6 0
3 years ago
Subtract -2k3 + k2 - 9 from 5k3 - 3k + 7. 3k3 + k2 - 3k - 2 -7k3 + k2 + 3k - 16 7k3 - k2 - 3k + 16
DanielleElmas [232]
It’s probably wrong but I got -7-2k7

5 0
4 years ago
Read 2 more answers
If the two congruent angles (angles A and B) of an isosceles
Darina [25.2K]

Answer:

If the third angle is x, the other two angles are 2x

 

The measure of the angles of a triangle must add up to 180 degrees

 

x + 2(2x) = 180

 

x + 4x = 180

 

5x = 180

 

x = 36

 

The other two angles are 2x = 2 * 36 = 72

 

The three angles are 36, 72, and 72 degrees

Step-by-step explanation:

EXAMPLE-

x+2x+2x=180

5x=180

x=180/5

x=36º third angle

the equal angles are each 2*36=72º

3 0
3 years ago
What is the surface area of the composite solid?
Brut [27]

Answer:

Correct answer is C. 162 m2

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
40 points! I just need this one, please help
vesna_86 [32]

Answer:

  • C. 3,75 cm

Step-by-step explanation:

<u>Ratio of corresponding sides:</u>

  • CD/BC = BC/AB
  • CD/6 = 6/9.6
  • CD = 6*6/9.6
  • CD = 3.75 cm

Correct choice is C

7 0
3 years ago
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