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goblinko [34]
3 years ago
11

Solve (x - 3)² = 5 Give your solutions correct to 3 significant figures.

Mathematics
2 answers:
zvonat [6]3 years ago
7 0

Answer:

\sqrt{5} +3, -\sqrt{5} + 3 or 5.236, 0.764

Step-by-step explanation:

Colt1911 [192]3 years ago
6 0

Answer:

x=5.24   x=0.764

Step-by-step explanation:

(x - 3)² = 5

Take the square root of each side

sqrt((x - 3)²) = sqrt(5)

x-3 = ±sqrt(5)

Add 3 to each side

x-3+3 = 3±sqrt(5)

x = 3±sqrt(5)

x = 3+sqrt(5)     x = 3-sqrt(5)

x=5.23606      x=0.76393

To 3 significant figures

x=5.24   x=0.764

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3 years ago
Am I correct with my answers?
Anni [7]

Answer:

  • w = 70° . . . . alternate interior angles
  • x = 70° . . . . alternate interior angles
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Step-by-step explanation:

The alternate interior angles theorem, and the angle sum theorem can be used here.

<h3>Alternate interior angles</h3>

Alternate interior angles are found on either side of a transversal where it crosses a pair of parallel lines. They are between the parallel lines. Their vertices are at the junction of the transversal and the parallel lines. Alternate interior angles are congruent.

In this diagram, there are two pairs of alternate interior angles where the two transversals AD and BD cross parallel lines AB and CD.

At points A and D, the alternate interior angles are 70° and x, respectively. This tells you ...

  x = 70° . . . . alternate interior angles theorem

At points B and D, the alternate interior angles are w and 70°, respectively. This tells you ...

  w = 70° . . . . alternate interior angles theorem

<h3>Angle sum</h3>

The angle sum theorem tells you the sum of angles in a triangle is 180°. This fact can be used to find the measure of angle y.

  70° +w +y = 180°

  y = 180° -70° -w = 110° -70°

  y = 40° . . . . angle sum theorem

There is not enough information to determine the measure of angle z.

  z = indeterminate

6 0
2 years ago
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