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3 years ago

15

The 7 represents how many times the value of the 7 in 78

1 answer:

natka813 [3]3 years ago

7 0

Answer: 11 times

Step-by-step explanation:

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Answer:

$(a)\ \sqrt{20}=2\sqrt{5}$

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Step-by-step explanation:

Required

Simplify

$(a)\ \sqrt{20}$

Express 20 as 4 * 5

$\sqrt{20}=\sqrt{4 * 5}$

Split

$\sqrt{20}=\sqrt{4} * \sqrt{5}$

This gives:

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$\sqrt{300} = \sqrt{100} * \sqrt{3}$

This gives:

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$(c)\ \sqrt{128}$

Express as 64 * 2

$\sqrt{128} = \sqrt{64*2}$

Split

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$\sqrt{128} = 8 * \sqrt{2}$

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<em></em>

<em>Questions 4 and 5 are not clear</em>

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