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3 years ago

What is... 7 4/7 + 14 4/5 Thank you so much!

Mathematics

1 answer:

SCORPION-xisa [38]3 years ago

7 0

$7+4/7+14+4/5$
$=7+14+4/7+4/5$
$=21+(4*7+4*5)/35$
$=21+48/35$
$=22+13/35$
$=22\frac{13}{35}$

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Answer:

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Step-by-step explanation:

<em>Two equations</em> are required to represent this problem as posed.

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3 years ago

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$De finition:\\\sqrt{a}=b\ \iff b^2=a\\=====================\\\\$

$625|5\\125|5\\.\ 25|5\\.\ \ 5|5\\.\ \ 1|\\\\625=5\times5\times5\times5=5^2\times5^2\\\\\sqrt{625}=\sqrt{5^2\times5^2}=(*)\\-------------------------------\\use:\ \sqrt{a\times b}=\sqrt{a}\times\sqrt{b}\ and\ \sqrt{a^2}=a\ for\ a\geq0\\-------------------------------\\(*)=\sqrt{5^2}\times\sqrt{5^2}=5\times5=\boxed{25}$

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3 years ago

What percent of 42 is 28

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We can create an equation.

What percent is x

'of' indicates multiplication

'is' indicates an equal sign

So we have:

x * 42 = 28

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Divide 42 to both sides:

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Multiply by 100 to convert to a percentage.

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