Select the correct answer.

Which expression is equivalent to [tex]10 \sqrt{5}[/tex]?

A. [tex]\sqrt{500}[/tex]
B. [tex]\sqrt{105}[/tex]
C. [tex]\sqrt{50}[/tex]
D. [tex]\sqrt{15}[/tex]



Answer :

To determine which expression is equivalent to [tex]\(10 \sqrt{5}\)[/tex], we will evaluate each given option:

Option A: [tex]\(\sqrt{500}\)[/tex]

First, let's simplify [tex]\(\sqrt{500}\)[/tex]:

[tex]\[ \sqrt{500} = \sqrt{100 \times 5} \][/tex]

We know that [tex]\(\sqrt{100}\)[/tex] is [tex]\(10\)[/tex], so:

[tex]\[ \sqrt{500} = \sqrt{100 \times 5} = \sqrt{100} \times \sqrt{5} = 10 \sqrt{5} \][/tex]

Therefore, [tex]\(\sqrt{500}\)[/tex] simplifies to [tex]\(10 \sqrt{5}\)[/tex], and thus it is equivalent to [tex]\(10 \sqrt{5}\)[/tex].

Option B: [tex]\(\sqrt{105}\)[/tex]

Next, we examine [tex]\(\sqrt{105}\)[/tex]. There are no perfect squares that are factors of 105:

[tex]\[ 105 = 3 \times 5 \times 7 \][/tex]

Since none of these factors are perfect squares, [tex]\(\sqrt{105}\)[/tex] cannot be simplified to [tex]\(10 \sqrt{5}\)[/tex].

Option C: [tex]\(\sqrt{50}\)[/tex]

Now, let's simplify [tex]\(\sqrt{50}\)[/tex]:

[tex]\[ \sqrt{50} = \sqrt{25 \times 2} \][/tex]

We know that [tex]\(\sqrt{25}\)[/tex] is [tex]\(5\)[/tex], so:

[tex]\[ \sqrt{50} = \sqrt{25 \times 2} = \sqrt{25} \times \sqrt{2} = 5 \sqrt{2} \][/tex]

Comparing [tex]\(5 \sqrt{2}\)[/tex] to [tex]\(10 \sqrt{5}\)[/tex], they are clearly not equivalent.

Option D: [tex]\(\sqrt{15}\)[/tex]

Finally, let's examine [tex]\(\sqrt{15}\)[/tex]. There are no perfect squares that are factors of 15:

[tex]\[ 15 = 3 \times 5 \][/tex]

Since none of these factors are perfect squares, [tex]\(\sqrt{15}\)[/tex] cannot be simplified to [tex]\(10 \sqrt{5}\)[/tex].

Conclusion:

The only option that is equivalent to [tex]\(10 \sqrt{5}\)[/tex] is:

A. [tex]\(\sqrt{500}\)[/tex]