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2 years ago

15

Translate the sentence into an equation. Twice the difference of a number and 4 is 9. Use the variable y for the unknown number.

1 answer:

gulaghasi [49]2 years ago

6 0

Answer:

2x-4=9

Step-by-step explanation:

2x-4=9

2x=y

2x=13

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2 years ago

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Step-by-step explanation:

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goldenfox [79]

Answer:

Step-by-step explanation:

( 2 , 26 )

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1 year ago

I put $500 in a saving account that earns 6% interest compounded semi-annually. How much interest will be in the account after 2

Nuetrik [128]

$\bf ~~~~~~ \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to &\$500\\
r=rate\to 6\%\to \frac{6}{100}\to &0.06\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{semi-annually, thus twice}
\end{array}\to &2\\
t=years\to &2
\end{cases}
\\\\\\
A=500\left(1+\frac{0.06}{2}\right)^{2\cdot 2}\implies A=500(1.03)^4\implies A=562.754405$

now, "A" is the accumulated amount, including the earned interest, how much interest was it earned? well, is just A - P.

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2 years ago