6x squared -54=0 Solve for square root

1 answer:

7 0

Sowe are going to work backward first were going to get rid off the negative 54 by adding it to the 0 making it 6x^2 =54 now were going to move the 6 by dividing both sides by 6 making it x^2=9 3 squared =9 so the variable is 3

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$\text{Given that }\$7000 \text{ is compounded semiannualy at a rate of }11\% \text{ for 21 years}\\
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\text{we know that the amount after t year when compounded is given by}\\
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A=P\left ( 1+\frac{r}{n} \right )^{nt}\\
\\
\text{here P is the principal amoount, so }P=7000,\\
\\
\text{r is the interest rate, }r=11\%=0.11\\
\\
\text{n is the number of times in a year, here semiannulay, so }n=2,\\
\\
\text{and t is the time, so }t=21\\
\\
\text{so the amount after 21 years is}$

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\Rightarrow A=7000\left ( 1.055 \right )^{42}\\
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