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3 years ago

The diameter of a circle is 20m. Find the circumference to the nearest tenth

Mathematics

1 answer:

AlladinOne [14]3 years ago

3 0

Answer:

62.8

Step-by-step explanation:

Using the circumference formula (πd) we can see that the answer is 20π, or 62.8

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Step-by-step explanation:

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3 years ago

Which of the following pairs of inequalities are equivalent

Andrew [12]

Answer:

(a): $x-5> 4$ and $2x-10 >8$

Step-by-step explanation:

Given

Pairs of inequalities

Required

Select which is equivalent

(a): $x-5> 4$ and $2x-10 >8$

Multiply both sides of $x-5> 4$ by 2

$2 * (x - 5) > 4 *2$

$2 * x - 2*5 > 4 *2$

$2x - 10 > 8$

Hence: $x-5> 4$ is equivalent to $2x - 10 > 8$

(b): $x-5> 4$ and $2x+10 >8$

Multiply both sides of $x-5> 4$ by 2

$2 * (x - 5) > 4 *2$

$2 * x - 2*5 > 4 *2$

$2x - 10 > 8$

Hence: $x-5> 4$ is not equivalent to $2x+10$

(c): $x+5> 4$ and $2x+10$

Multiply both sides of $x+5> 4$ by 2

$2 * (x + 5) > 4 *2$

$2 * x + 2*5 > 4 *2$

$2x + 10 > 8$

Hence: $x+5> 4$ is not equivalent to $2x+10$

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3 years ago