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4 years ago

5

Lock #2 Dr. E. Quation says that 8 times the population rank of South Korea in a list of countries by population is the same as

the number of his dastardly inventions that have failed, 224. What is the rank of South Korea? *

1 answer:

garri49 [273]4 years ago

3 0

Answer:

28

Step-by-step explanation:

Let s = South Korea Rank

8s = 224

$s=\frac{224}{8}$

s = 28

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Answer:

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Step-by-step explanation:

Mathematically;

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Help! 7th grade math/ angles.

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Answer:

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Step-by-step explanation:

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4 years ago

Solve for y. y/m + y/n = p

RUDIKE [14]

<h3>Given :</h3>

$\boxed{ \rm \frac{y}{m} + \frac{y}{n} = p}$

$\\ \\$

<h3>To find:</h3>

$\\$

Value of y

$\\ \\$

<h3>Step by step expansion:</h3>

$\dashrightarrow \sf\dfrac{y}{m} + \dfrac{y}{n} = p$

write the equation

$\\ \\$

$\dashrightarrow \sf \dfrac{\frac{y \times mn}{m} + \frac{y \times mn}{n}}{mn} = p$

Add y/n with y/n and we will get Lcm as mn

$\\ \\$

$\dashrightarrow \sf \dfrac{\frac{y \times \cancel mn}{\cancel m} + \frac{y \times m\cancel n}{\cancel n}}{mn} = p$

Cancel the similar terms

$\\ \\$

$\dashrightarrow \sf \dfrac{\frac{y \times n}{1} + \frac{y \times m}{1}}{mn} = p$

$\\ \\$

$\dashrightarrow \sf \dfrac{yn + ym}{mn} = p$

remove 1 as denominator

$\\ \\$

$\dashrightarrow \sf \dfrac{y(n + m)}{mn} = p$

take y as common

$\\ \\$

$\dashrightarrow \sf \dfrac{(n + m)}{mn} = \dfrac{p}{y}$

transfer y to other side as denominator of p

$\\ \\$

$\dashrightarrow \sf \dfrac{mn}{(n + m)} = \dfrac{y}{p}$

reciprocal the whole equation

$\\ \\$

$\dashrightarrow \sf \dfrac{mnp}{(n + m)} = \dfrac{y}{1}$

transfer p other side as numerator

$\\ \\$

$\dashrightarrow \boxed{ \bf y = \dfrac{mnp}{(n + m)} }$

$\\ \\$

$\therefore \red {\underline {\textbf{\textsf{Option 2 i.e \{y= mnp/(m+n) \} is correct }}}}$

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