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andrey2020 [161]
3 years ago
13

After a 40% discount the cost of a sofa is $471 what was the original cost of the sofa?

Mathematics
1 answer:
sp2606 [1]3 years ago
8 0

100% - 40% = 60%, meaning the discounted price is really just 60% of the original 100% price, let's say the 100% price is hmmmm "x".

if 60% of the original price is $471, what is the 100% or namely "x"?

\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 471&60\\ x&100 \end{array}\implies \cfrac{471}{x}=\cfrac{60}{100}\implies \cfrac{471}{x}=\cfrac{3}{5}\implies 2355 = 3x \\\\\\ \cfrac{2355}{3}=x\implies 785=x

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6 0
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Answer:

A. 5 < AC < 10

Step-by-step explanation:

If ∆ABC is a right angled triangle, we use the Pythagoras formula:

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