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3 years ago

9

−3(2x+7)=12x what is x?

2 answers:

velikii [3]3 years ago

5 0

X=-7/6
That is the answer

MissTica3 years ago

3 0

Step-by-step explanation:

x equals negative 1 and one over 6 or 7 / 6 or 1.16 with a hat on top

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Use the formula to evaluate the series 1/4 + 1/9 + 1/27 + 1/81.

Dmitriy789 [7]

Is the first term supposed to be 1/4, or did you actually mean 1/3?

I'll assume the latter. Write

$S=\dfrac13+\dfrac19+\dfrac1{27}+\dfrac1{81}$
$S=\dfrac13+\dfrac1{3^2}+\dfrac1{3^3}+\dfrac1{3^4}$
$\dfrac13S=\dfrac1{3^2}+\dfrac1{3^3}+\dfrac1{3^4}+\dfrac1{3^5}$
$\implies S-\dfrac13S=\dfrac13-\dfrac1{3^5}$
$\dfrac23S=\dfrac13\left(1-\dfrac1{3^4}\right)$
$S=\dfrac12\left(1-\dfrac1{81}\right)$
$S=\dfrac{40}{81}$

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xeze [42]

Answer:

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Common factor for 12 and 24

Afina-wow [57]

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3 years ago

The balance owed on your credit card triples from $700 to $2100 in 12 months. If the balance is growing linearly then it would t

Fofino [41]

Answer:

If the balance is growing exponentially the balance after 45.4 months will be $44,925.94.

Step-by-step explanation:

The exponential growth equation is:

$f(x)=700(1+0.096)^{x}$

Compute the value of f (x) for <em>x</em> = 45.4 as follows:

$f(x)=700(1+0.096)^{x}$

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Thus, if the balance is growing exponentially the balance after 45.4 months will be $44,925.94.

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Step-by-step explanation:

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2 years ago