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Korolek [52]
2 years ago
13

The mark up on an item is $3.75. If the mark up is 35%, what was the original price? Round

Mathematics
1 answer:
oksian1 [2.3K]2 years ago
5 0

Answer:

$10.71

Step-by-step explanation:

\frac{3.75}{y} =\frac{35}{100}

y × 35 = 3.75 × 100

35y = 375

35y ÷ 35 = 375 ÷ 35

y=10\frac{5}{7}

y = 10.7142857143

10.7142857143 round to 10.71

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Cos130° = _____<br><br> -cos50°<br> cos50°<br> cos(-50°)
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Answer:

cos(-50°)

Step-by-step explanation:

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2 years ago
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If ax2 + bx + c = 0, then x= ? (Hint: Quadratic Formula)
Finger [1]

Answer:

x = ± \sqrt{\frac{b^{2} -4ac}{2a}

It didn't insert but just look up the quadratic formula.  

x = ± root [(b²-4ac]/2a]

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3 years ago
What is the solution set of the given system?
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What is the system? (Is there supposed to be an image?)

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Can 3.65909090909 be expressed as a fraction whose denominator is a power of 10? Explain.
GuDViN [60]
\bf 3.659\textit{ can also be written as }\cfrac{3659}{1000}\textit{ therefore }3.6590909\overline{09}\\\\&#10;\textit{can be written as }\cfrac{3659.0909\overline{09}}{1000}

notice above, all we did, was isolate the "recurring part" to the right of the decimal point, so the repeating 09, ended up on the right of it.

now, let's say, "x" is a variable whose value is the recurring part, therefore then

\bf \cfrac{3659.0909\overline{09}}{1000}\qquad \boxed{x=0.0909\overline{09}} \qquad \cfrac{3659+0.0909\overline{09}}{1000}\implies \cfrac{3659+x}{1000}

now, the idea behind the recurring part is that, we then, once we have it all to the right of the dot, we multiply it by some power of 10, so that it moves it "once" to the left of it, well, the recurring part is 09, is two digits, so let's multiply it by 100 then, 

\bf \begin{array}{llllllll}&#10;100x&=&09.0909\overline{09}\\&#10;&&9+0.0909\overline{09}\\&#10;&&9+x&#10;\end{array}\quad \implies 100x=9+x\implies 99x=9&#10;\\\\\\&#10;x=\cfrac{9}{99}\implies \boxed{x=\cfrac{1}{11}}\\\\&#10;-------------------------------\\\\&#10;\cfrac{3659.0909\overline{09}}{1000}\qquad \boxed{x=0.0909\overline{09}} \quad \cfrac{3659+0.0909\overline{09}}{1000}\implies \cfrac{3659+x}{1000}&#10;\\\\\\&#10;\cfrac{3659+\frac{1}{11}}{1000}

and you can check that in your calculator.
8 0
3 years ago
Vicky downloaded to apps on her iPhone the first app was $599 and the second Apple was 14. $33 how much did Vicky spend on the a
Gala2k [10]

Answer:

573.33

Step-by-step explanation:

599+14.33

= 573.33

(if rounding then its  600+14.33) = 614.33

5 0
2 years ago
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