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Maksim231197 [3]
3 years ago
10

If xy = a and x2 + y2 = b, which of the following is equivalent to 9b – 18a ?

Mathematics
1 answer:
Llana [10]3 years ago
5 0

Answer:

  A)  (3x -3y)²

Step-by-step explanation:

9b -18a = 9(x² +y²) -18xy

  = 9x² -18xy +9y²

  = (3x -3y)² . . . . . matches choice A

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In the game kazoo teams lose one point each time they skip a turn they earn a point each time there team guesses correctly.
gogolik [260]
Given that the team starts with a score of 0, after skipping 8 turns they would have 8 points deducted and thus end up with a score of -8. Now if they guess 6 answers correctly this would add 6 points to their score and so they would end up with -8 + 6 = -2 points.
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What is the answer to this math problem​
vesna_86 [32]

Hello from MrBillDoesMath!

Answer:

1/243

Discussion:  

3^(-3) *  3^(-2)                => as a^m * a^n = a^(m+n), the exponents add

= 3^ (-3 -2)

= 3^ (-5) =

= 1/ 3^5                           => as 3^5 = 243

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3 years ago
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Need help please ! parallelogram
OverLord2011 [107]

Answer:

11). m∠W = 70°

12). m∠M = 95°

13). m∠Q = 135°

14). m∠Q = 55°

15). m∠X = 110°

Step-by-step explanation:

11). m∠W + m∠X = 180° [Consecutive interior angles]

    (24x - 2) + (36x + 2) = 180°

     60x = 180°

     x = \frac{180}{60}

     x = 3

     Therefore, m∠W = (24x - 2)°

     m∠W = (24×3 - 2)

               = 72 - 2

               = 70°

     Since opposite angles of a parallelogram are equal in measure.

     m∠Y = m∠W = 70°

12). m∠J + m∠K = 180° [Consecutive interior angles]

     (6x + 19) + (8x + 7) = 180°

     14x + 26 = 180

     14x = 180 - 26

     14x = 154

     x = \frac{154}{14}

     x = 11

     m∠K = (8x + 7)

     m∠K = 8×11 + 7

     m∠K = 95°

     Since m∠M = m∠K

     Therefore, m∠M = 95°

13). m∠Q = m∠S [Opposite angles of a parallelogram]

      x + 135 = 2x + 135

      2x - x = 0

      x = 0

      Therefore, m∠Q = 135°

14). m∠Q = m∠S [Opposite angles of a parallelogram]

      14x - 1 = 13x + 3

      14x - 13x = 3 + 1

      x = 4

      m∠Q = (13x + 3)

                = 13×4 + 3

                = 52 + 3

      m∠Q = 55°

15). m∠Z = m∠X

     (19x - 4) = (17x + 8)

      19x - 17x = 12

      2x = 12

      x = 6

      m∠X = (17x + 8)°

      m∠X = 17×6 + 8

      m∠X = 110°

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3 years ago
A brother and a sister are in the same math class. there are 8 boys and 10 girls in the class. one boy and one girl are randomly
timama [110]
The best one is 1/9 maybe

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3 years ago
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Hamster111 yes please
Rufina [12.5K]

Answer:

Indeed

Step-by-step explanation:

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