3 years ago

Assistance with polynomials

Mathematics

1 answer:

TiliK225 [7]3 years ago

4 0

Should be the second one.

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If the simple interest on $5,000 for 9 years is $1,800, then what is the interest rate?

Law Incorporation [45]

$I = Prt\qquad \begin{cases} I=\textit{interest earned}\dotfill & \$1800\\ P=\textit{original amount deposited}\dotfill & \$5000\\ r=rate\to r\%\to \frac{r}{100}\\ t=years\dotfill &9 \end{cases} \\\\\\ 1800=5000(\frac{r}{100})(9)\implies \cfrac{1800}{5000(9)}=\cfrac{r}{100}\implies \cfrac{1}{25}=\cfrac{r}{100} \\\\\\ 100=25r\implies \cfrac{100}{25}=r\implies \stackrel{\%}{4}=r$

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2 years ago

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matrenka [14]

Answer:

9 inches

Step-by-step explanation:

4 x 3 = 12

so 3 x 3 = 9

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3 years ago

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Step-by-step explanation:

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3 years ago

What is N in -2n+2(3n+14)=-20

seraphim [82]

Answer:

To solve for n you need to get it by itself

First you want to distribute your 2 through the (3n+14)

-2n+6n+28=-20 (2*3n+2*14= 6n+28)

Now you want to combine any like terms if possible

4n+28=-20 (-2n+6n=4n, both like terms)

Then you want to subtract -28 from both sides

4n=-48 (28-28=0, -20-28=-48)

Lastly you want to divide both sides by 4

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Answer:

Step-by-step explanation:

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