HELP !!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

stira [4]3 years ago

3 0

Answer:

Step-by-step explanation:

2.7 rounded is 3,

7.4 rounded is 7,

7×3=21

Hope that this helps you and have a great day :)

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The type of data that contains results from other people that are of similar age and gender is known as

yuradex [85]

The type of data that contains results from other people that are of similar age and gender is known as normative data.

<h3>What is normative data?</h3>

Normative data is a type of data that is observed that contains information about the characteristics of a population of interest. For example, normative data about students in a class would contain information such as age, gender, height.

To learn more about data, please check: brainly.com/question/20841086

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4 0

2 years ago

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liraira [26]

Answer:

that's my answer

Step-by-step explanation:

i hope it helps

5 0

3 years ago

30/root 3-3 root 5<br> Ple answer this question

adoni [48]

$\frac{30}{ \sqrt{3} - 3 \sqrt{5} } \\ \\ =\frac{30}{ \sqrt{3} - 3 \sqrt{5} } \times \frac{\sqrt{3} + 3 \sqrt{5}}{\sqrt{3} + 3 \sqrt{5}} \: \\ \\ that \: simply \: means \: multiplying \: by \: 1 \\ \\ \frac{30(\sqrt{3} + 3 \sqrt{5})}{ (\sqrt{3} + 3 \sqrt{5}) (\sqrt{3} - 3 \sqrt{5}) } \: \: \\ \\ by \: using \: formula \: {a}^{2} - {b}^{2} \\ \\ we \: get \\ \\ = \frac{30 \sqrt{3} + 90 \sqrt{5} }{ 3 - 45} \\ \\ = - \frac{30( \sqrt{3} + 3 \sqrt{5}) }{42} \\ \\ = - \frac{10( \sqrt{3} + 3 \sqrt{5}) }{14} \: \:$