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Alina [70]
2 years ago
12

The square of a certain number plus ten is equal to 81​

Mathematics
1 answer:
Scorpion4ik [409]2 years ago
3 0

Answer:

x = ±8.43 (to 3sf)

Step-by-step explanation:

Let this number be x.

x² + 10 = 81

      x² = 81 - 10

           = 71

        x = ±√71

           = ±8.43 (to 3sf)

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The area of the triangle is 4 units²

<h3>What is the area of a triangle?</h3>

The area of a triangle is the half the base multiplied with the height of that triangle

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From the figure given,

base = 7 - 3 = 4 units

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Learn more about a triangle here:

brainly.com/question/1475130

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Answer:

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The answer is:19.52.

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A similar example is given at brainly.com/question/14544759

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