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marshall27 [118]
3 years ago
5

the sum of three numbers is 30. twice the first minus the second is 3 less than the third. the third us the second minus three t

imes the first. find the numbers
Mathematics
1 answer:
EleoNora [17]3 years ago
7 0
8,72,18 is this what your looking for
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PLEASE HELP<br>Find the solution of this system of equations <br> -5x=-21+6y <br> -5x+y=-84
NeTakaya
-5x - 6y = -21
5x - y =. 84

-7y = 63

y= -9

-5x = -21 - 54

-5x = -75

x = 15
4 0
3 years ago
Help please! Do not answer if you are not going to help me
kirza4 [7]

9514 1404 393

Answer:

  12. (x, D, E, F) = (8, 38°, 75°, 67°)

  13. (x, P, Q, R) = (13, 126°, 30°, 24°)

Step-by-step explanation:

The sum of angles in a triangle is 180°. We choose to write the equations assuming all measures are degrees.

12. (5x -2) +(9x +3) +(11x -21) = 180

  25x = 200 . . . . . . . add 20, simplify

  x = 8 . . . . . . . . . divide by 25

Then the angle measures are ...

  ∠D = 5(8) -2 = 38°

  ∠E = 9(8) +3 = 75°

  ∠F = 11(8) -21 = 67°

__

13. (10x -4) +(4x -22) +(x +11) = 180

  15x = 195 . . . . . . . . . . add 15, simplify

  x = 13 . . . . . . . . . divide by 15

Then the angle measures are ...

  ∠P = 10(13) -4 = 126°

  ∠Q = 4(13) -22 = 30°

  ∠R = 13 +11 = 24°

4 0
3 years ago
Subtract 7x + 2 from –5x2 – 2x.
Aleks [24]

Answer:

5x^2 + 9x + 2

Step-by-step explanation:

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Find two consecutive whole numbers that 83 lies between.
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82, 84

Step-by-step explanation:

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∠ABC and ∠CBD are complementary angles. m∠ABC = (3x + 6)º and m∠CBD = (4x – 14)º.
yuradex [85]
You need use your strategies multiplie it than simplify to k and than move it to E tens
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2 years ago
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