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3 years ago

A rectangle has an area of 20 square centimeters.

Mathematics

1 answer:

prisoha [69]3 years ago

8 0

Answer:

All but the first answer choice could be the length and width of a rectangle.

Step-by-step explanation:

3 cm and 8 cm produce 24 cm^2 when multiplied together. Reject.

1 cm and 20 cm, when multiplied together, result in 20 cm^2. Select.

2 cm and 10 cm => 20 cm^2 Select

4 cm and 5 cm => 20 cm^2. Select

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xxMikexx [17]

Answer:

The answer is 4 + √15 .

Step-by-step explanation:

You have to get rid of surds in the denorminator by multiplying it with the opposite sign :

$\frac{ \sqrt{5} + \sqrt{3} }{ \sqrt{5} - \sqrt{3} }$

$= \frac{ \sqrt{5} + \sqrt{3} }{ \sqrt{5} - \sqrt{3} } \times \frac{ \sqrt{5} + \sqrt{3} }{ \sqrt{5} + \sqrt{3} }$

$= \frac{ {( \sqrt{5} + \sqrt{3} ) }^{2} }{( \sqrt{5} - \sqrt{3} )( \sqrt{5} + \sqrt{3}) }$

$= \frac{ {( \sqrt{5} )}^{2} + 2( \sqrt{5} )( \sqrt{3}) + {( \sqrt{3}) }^{2} }{ {( \sqrt{5}) }^{2} - { (\sqrt{3} )}^{2} }$

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3 years ago

At a sale, a table is being sold for 27% of the regular price. The sale price is $156.60.

8_murik_8 [283]

Answer:

$580

Step-by-step explanation:

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Original price = $580

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3 years ago

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Answer:

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Step-by-step explanation:

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