Heidi buys shirts for $20 and resells for $24. What is the percentage of Heidi's markup? Plz help me!!

Mathematics

1 answer:

Vadim26 [7]3 years ago

8 0

20% because 4 dollars is 1/5 of 20

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UkoKoshka [18]

Check the picture below.

so, as you can see, the UV segment is parallel to ZW, and therefore, they're the same slope, hmmm wait just a second, what is the slope of ZW anyway?

$\bf \begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
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% (c,d)
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since now we know the ZW slope, we also know what is the slope for UV, thus,

$\bf \begin{array}{ccccccccc}
&&x_1&&y_1&&x_2&&y_2\\
% (a,b)
&U&(~ a &,& 0~) 
% (c,d)
&V&(~ x &,& y~)
\end{array}
\\\\\\
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\begin{cases}
y-0=b\implies \boxed{y=b}\\
-----------\\
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Answer:

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Step-by-step explanation:

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