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sattari [20]
3 years ago
15

Helppp and explain than you

Mathematics
2 answers:
ss7ja [257]3 years ago
5 0

9514 1404 393

Answer:

  1. x = 2
  2. (-5, 4, 6)

Step-by-step explanation:

1. Substitution can work for this.

  2x +3(4x -5) = 13

  14x = 28 . . . . . add 15

  x = 2 . . . . . . . divide by 14

__

2. The equation z=6 eliminates all but the 1st and 3rd choices. Using that value in the first equation gives ...

  x + y + 6 = 5

  x + y = -1

Only the 3rd choice satisfies this equation.

  (x, y, z) = (-5, 4, 6)

Radda [10]3 years ago
3 0

Answer:

1) x = 2

Step-by-step explanation:

Hope it helps. I'll try to solve the second one too

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Using the normal distribution, it is found that 63.18% of the area under the curve of the standard normal distribution is between z = − 0.9 z = - 0.9.

<h3>Normal Probability Distribution</h3>

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