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konstantin123 [22]
4 years ago
7

Please help.. nobody will help me and I’ve been asking this question so many times but nobody will answer..

Mathematics
1 answer:
lisov135 [29]4 years ago
5 0

Answer:

The floor covers 81yd^{2}

Step-by-step explanation:

This question is actually easier than you think, but I am here to help.

First off you know the room is a square. All squares have equal sides no matter what, that is the number 1 basic rule. (27ft by 27ft)

1. Find the area of the square: To find area you multiply Length by Width. Since you are multiplying two units you will get a squared value. The square measures 27 ft by 27 ft on both sides.

Lets multiply those two numbers:

(27 * 27) = 729ft^{2}

We need to stay in the same unit because you are multiplying two values of the same unit. The total square feet of the room is 729ft^{2}

2. Next, all you need to do is convert ft^{2} to yd^{2}

Like you mentioned: (1 yd^{2}  = 9ft^{2})

Now lets create a proportion between the two unit:

\frac{729ft^{2} }{1} * \frac{1yd^{2} }{9ft^{2} }

The ft^{2} unit cross cancels and your left with yd^{2}.

Now all you do is multiply straight across and you get \frac{729yd^{2} }{9}  = 81 yd^{2}

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Which pair of expressions are equivalent?
Amiraneli [1.4K]

Answer:

3n + 7 + n and 4n + 7

Step-by-step explanation:

4 0
4 years ago
John opens a savings account with $1,000 that compounds interest daily. The APR at the time John deposits the account is 3.5%. H
3241004551 [841]
\bf \qquad  \qquad  \textit{Annual Yield Formula}
\\\\
\qquad \qquad \left(1+\frac{r}{n}\right)^{n}-1
\\\\
\begin{cases}
r=rate\to 3.5\%\to \frac{3.5}{100}\to &0.035\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{daily, so in a year is 365}
\end{array}\to &365
\end{cases}
\\\\\\
\left(1+\frac{0.035}{365}\right)^{365}-1

you'll get a decimal format, just multiply it times 100, to get the % format
6 0
3 years ago
Read 2 more answers
15. A soccer ball kicked into the air reaches 15 feet in 3 second and falls to 4 points
charle [14.2K]

Answer:

2.6 ft/s

Step-by-step explanation:

Given that a soccer ball kicked into the air reaches 15 feet in 3 second. The first rate or speed will be:

Rate 1 = 15/3 = 5 feet/s

and falls to 3 feet after 5 seconds. Also, the second rate or second speed will be:

Rate 2 = ( 15 - 3 ) / 5

Rate 2 = 12 / 5

Rate 2 = 2.4 ft/ s

What is the rate of change between the 3rd second and the 5th second? That is, the change in speed. Which can be expressed as:

The rate of change = 5 - 2.4

The rate of change = 2.6 ft/s

6 0
3 years ago
If you were to flip a coin 10 times, what is the probability that it will land on heads exactly 7 out of 10 times?
bezimeni [28]

Answer:

The probability of flipping a coin 10 times and it landing on heads exactly seven times is about 0.1172 or 11.72%.

Step-by-step explanation:

We can use basic binomial distribution, which is given by the formula:

\displaystyle P(x) = {n \choose x}p^xq^{n-x}

Where <em>n</em> represent the number of trials, <em>x</em> represent the number of successes desired, <em>p</em> represent the chance of success, and <em>q</em> represent the chance of failure.

Since we are flipping a coin 10 times, we are conducting 10 trials. So, <em>n</em> = 10.

We want to probability that it lands on heads exactly 7 out of 10 times. So, the number of desired successes <em>x</em> is 7.

The probability of success <em>p</em> is 1/2.

And the probability of failure <em>q</em> is also 1/2.

Substituting:

\displaystyle P(7)={10 \choose 7}\left(\frac{1}{2}\right)^7\left(\frac{1}{2}\right)^3=120\left(\frac{1}{2}\right)^{10}=\frac{120}{1024}=\frac{15}{128}\approx0.1172

The probability of flipping a coin 10 times and it landing on heads exactly seven times is about 0.1172 or 11.72%.

8 0
3 years ago
What is the slope of y=-x+7
Olenka [21]

Answer:

-1

Step-by-step explanation:

This is the slope because x is the slope, and if there is no number in front of x then x is 1. There is also a negative in front of x which means the answer is -1.  

3 0
3 years ago
Read 2 more answers
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