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Orlov [11]
3 years ago
5

−4x+7y=20 y=3x+15 ​Solve the system of equations.

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
5 0

Answer:

(x, y)=(-5, 0)

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12/14=6/7

Because you divide by 2. 
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What is the value of the missing exponent in the expression below 523 ÷ 10□ = 52.3
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The sum of the digits of a three digit number is 19. The second digit is one more than the first digit. The third
Oxana [17]

Answer:

  • D. 568

Step-by-step explanation:

Let the number is in the form of xyz

<h3>We have</h3>

Sum of the digits is 19

  • x + y + z = 19

The second digit is one more than the first digit

  • y = x + 1

The third digit is two more than the second digit

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<u>Substitute the values of y and z</u> into the first equation and solve for x

  • x + x + 1 + x + 3 = 19
  • 3x + 4 = 19
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  • x = 5

<u>Find the value of y and z</u>

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  • z = 5 + 3 = 8

The number is 568

5 0
2 years ago
Please can some one both ​
tatyana61 [14]

Answer:

The answers are

r=9

n=8.

7 0
3 years ago
Plz help will mark you brainliest if correct
inn [45]

Answer:

B

Step-by-step explanation:

5/1 is not equal to 6/2 or 7/3 or 8/4

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