Write an equation Eight times the sum of m and 7 is 21

Mathematics

2 answers:

guajiro [1.7K]2 years ago

6 0

Answer:

the equation would be 8(m+7)=21

Aleonysh [2.5K]2 years ago

6 0

8 ( m + 7 ) = 2 1
your welcome ! <3

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If you add Natalie's age and Fred's age, the result is 36. If you add Fred's age to 4 times Natalie's age, the result is 72.

kozerog [31]

The known facts

the sum of Natalie's age and Fred's age is 36
the sum of Fred's age times four and Natalie's age is 72

Now, let's set up the equations where N is Natalie's age and F is Fred's age.

N + F = 36 ---- equation 1

N + 4F = 72 ---- equation 2

equation 2 minus equation 1 ---> 3F = 36 ---> F = 12, thus N = 24

Thus Fred is 12 years old, and Natalie is 24 years old.

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2 years ago

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Solve for a<br> -1/4a - 4 = 7/4a -3

Juli2301 [7.4K]

Answer:

21 because -1/4a - 4 is 22

8 0

2 years ago

Quadrant:

NISA [10]

<h2>✒️Area Between Curves</h2>

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2 years ago

How much will $850 amount to be in three years if it is invested at 8% interest compounded quarterly for 3 years? A. $886.47 B.

Dimas [21]

$\bf \qquad \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{compounded amount}\\
P=\textit{original amount deposited}\to &\$850\\
r=rate\to 8\%\to \frac{8}{100}\to &0.08\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{quarterly, so four times}
\end{array}\to &4\\

t=years\to &3
\end{cases}$