3 years ago

Taylor buys necklaces at wholesale for her store for $6, then she adds a mark up of

Mathematics

1 answer:

Gwar [14]3 years ago

8 0

Cost is 6 USD

Selling price is 6 + markup

Markup = 6 * 120 /100 put this expression and check again selling price

Selling price = 6 + (6 * 120) / 100

= 13,2 usd

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What is the first term in a geometric sequence if the common ratio is − 2 and the sum of the first six terms is −105?

Serggg [28]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
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\end{cases}$

$\bf -105=a_1\left( \cfrac{1-(-2)^6}{1-(-2)} \right)\implies -105=a_1\left( \cfrac{1-(64)}{1+2} \right)
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3 years ago

Solve the equation -9v-9=-27 for v.

Nikolay [14]

Answer:

v=2

Step-by-step explanation:

-9v-9=-27

add nine to both sides

-9v-9+9=-27+9

simplify

-9v=-18

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simplify y=2

hope this helps :) have a nice day !!

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iren2701 [21]

What he said

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Sunny_sXe [5.5K]

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Step-by-step explanation:

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