3 years ago

Which expression simplifies to

Mathematics

1 answer:

Juliette [100K]3 years ago

3 0

Answer:

Answer: D)-(-1/2)×(-4/5)

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3 years ago

Of two numbers, one is 7 more than the other. Find the numbers if their sum is 21

RideAnS [48]

It would be 14 and 7.

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3 years ago

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A town with a population of 600 need a team of 10 firefighters. How many firefighters are needed for a town with 1500 people?

Rasek [7]

Answer:

A town with 600 people need 10 firefighters

A town with 1500 people will need 1500 x 10/600 = 1500/60

= 25 firefighters

Hope this helps!

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4 years ago

Choose the equation that represents the line that passes through the point (6,-3,) and has a slope of 1/2

dezoksy [38]

Answer:

$y=\frac{1}{2}x-6$

Step-by-step explanation:

The general equation of a line: $y = ax+b$

In our case a is given

$a=\frac{1}{2}$

Now we plug in for a and we get:

$y=\frac{1}{2}*x+b$

Now we plug in our coordinates into this equation and we solve for b

$-3=\frac{1}{2}*6+b\\b = -6$

So the equation of the line is $y=\frac{1}{2}x-6$

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4 years ago

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Mary invests £12000 in a savings account. The account pays 1.5% compound interest per year. Work out the value of her investment

vazorg [7]

$\bf \qquad \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to &12000\\
r=rate\to 1.5\%\to \frac{1.5}{100}\to &0.015\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{per year, thus once}
\end{array}\to &1\\
t=years\to &2
\end{cases}
\\\\\\
A=12000\left(1+\frac{0.015}{1}\right)^{1\cdot 2}$

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4 years ago