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sweet-ann [11.9K]
3 years ago
14

Give the numerical coefficient of the term -19x

Mathematics
1 answer:
Elenna [48]3 years ago
4 0

Answer: The answer is -19.

Step-by-step explanation: We are given to write the numerical coefficient of -9x.

The given expression is a monomial with unknown variable 'x'.

We know that a numerical coefficient of a monomial is a constant multiplied to the variable(s). For example, in the term -5xy, the unknown variables are 'x' and 'y' and the numerical coefficient is -5.

Therefore, in -9x, the unknown variable is 'x' and the numerical coefficient is -9.

Thus, the answer is -9.

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Solve the following 3 × 3 system. Enter the coordinates of the solution below.
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Answer:

  (x, y, z) = (-1, 0, -3)

Step-by-step explanation:

We notice that the coefficients of z are such that elimination of the z term from the equations is made easy.

Adding equations 1 and 2:

  (2x -3y -2z) +(x +3y +2z) = (4) +(-7)

  3x = -3

  x = -1

Adding equations 2 and 3:

  (x +3y +2z) +(-4x -4y -2z) = (-7) +(10)

  -3x -y = 3

Substituting for x, we get ...

  (-3)(-1) -y = 3

 0 = y . . . . . . . . . . . add y-3 to both sides

Then z can be found from any equation. Substituting for x and y in the second equation gives ...

  -1 +2z = -7

  2z = -6 . . . . . add 1

  z = -3 . . . . . .divide by 2

The solution is (x, y, z) = (-1, 0, -3).

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Step-by-step explanation:

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