3 years ago

What is the answer to sqrt(-49)

Mathematics

1 answer:

kkurt [141]3 years ago

5 0

Answer:

-7

Step-by-step explanation:

7 times 7 equals 49 so the sqrt of -49 is -7

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Money is borrowed at 9% simple interest. After one year, $1178.29 pays off the loan. How much was originally borrowed?

qwelly [4]

$\bf ~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\dotfill&1178.29\\ P=\textit{original amount deposited}\dotfill \\ r=rate\to 9\%\to \frac{9}{100}\dotfill &0.09\\ t=years\dotfill &1 \end{cases} \\\\\\ 1178.29=P(1+0.09\cdot 1)\implies 1178.29=P(1.09)\implies \cfrac{1178.29}{1.09}=P \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill 1081=P~\hfill$