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Zepler [3.9K]
1 year ago
14

Fatima purchased a new mattress when it was on sale. The sale price was 20% less than the regular price. If the sale price was $

358, what was the original price? (Round your answer to the nearest dollar).
Mathematics
2 answers:
Drupady [299]1 year ago
4 0

well, the regular price is really "x", which oddly enough is 100%, but we also know that $358 is really the discounted price by 20%, namely 100% - 20% = 80%, so we know that 358 is really just 80% of "x", so

\begin{array}{ccll} amount&\%\\ \cline{1-2} x & 100\\ 358& 80 \end{array} \implies \cfrac{x}{358}~~=~~\cfrac{100}{80} \\\\\\ \cfrac{x}{358}=\cfrac{5}{4}\implies 4x=1790\implies x=\cfrac{1790}{4}\implies x\approx 448

Luden [163]1 year ago
3 0
20% equals 0.2
100% - 20% = 80% or 0.08

358 / 0.8 = $447.50

Check
447.50 * 0.8 = 358
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2 years ago
How do i find the x intercet for y=6x−7.
kolezko [41]

Answer:

Step-by-step explanation:  

y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.

In this formula :

y tells us how far up the line goes

x tells us how far along

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b is the Y-intercept i.e. where the line crosses the Y axis

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Graph of a Straight Line

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 y-intercept = -7/1  = -7.00000

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Calculate the Slope :

Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is -7.000 and for x=2.000, the value of y is 5.000. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 5.000 - (-7.000) = 12.000 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

  Slope     = 12.000/2.000 =  6.000

 Slope = 12.000/2.000 = 6.000

 x-intercept = 7/6 = 1.16667

 y-intercept = -7/1 = -7.00000

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3 years ago
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tatiyna

Answer:

Step-by-step explanation:

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