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Hunter-Best [27]
3 years ago
11

Which expression is equivalent to -1/4x + 1/2?

Mathematics
1 answer:
Alik [6]3 years ago
7 0

Answer:

C because that's the only one that works

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Answer:

c) 5√2 cm

Step-by-step explanation:

A square with side length l has a perimeter given by the following equation:

P = 4l.

In this question:

P = 20

So the side length is:

4l = 20

l = 20/4

l = 5

Diagonal

The diagonal forms a right triangle with two sides, in which the diagonal is the hypothenuse. Applying the pytagoras theorem.

d^{2} = l^{2} + l^{2}

d^{2} = 5^{2} + 5^{2}

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d = \pm \sqrt{50}

Lenght is a positive meausre, so

d = \sqrt{50}

d = \sqrt{2 \times 25}

d = \sqrt{2} \times \sqrt{25}

d = 5\sqrt{2}

So the correct answer is:

c) 5√2 cm

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