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finlep [7]
3 years ago
10

Help please and thanks! :)​

Mathematics
1 answer:
Amanda [17]3 years ago
5 0
For number 1. Is 21 = 21
Number 2. 12/25
Number 3. 9
Number 4. 64 =64
Number 5. 15 = 5
Number 6. 4= 4
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Scrat [10]

Answer:

Step-by-step explanation:

Slope = (change in y)/ (change in x)

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The speed of a stream is 4 mph a boat travels 3 miles upstream in the same time it takes to travel 11 miles downstream what is t
vazorg [7]
\bf \begin{array}{lccclll}
&distance&rate&time\\
&-----&-----&-----\\
upstream&3&r-4&t\\
downstrea&11&r+4&t
\end{array}\\\\\\ recall\implies d=rt\\\\
-----------------------------\\\\

\begin{cases}
3=(r-4)(t)
\\\\
11=(r+4)(t)\\
--------------\\
3=(r-4)(t)\to \frac{3}{r-4}=\boxed{t}\qquad thus
\\\\
11=(r+4)(t)\to 11=(r+4)\left(  \boxed{\frac{3}{r-4}}\right)
\end{cases}

solve for "r"
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3 years ago
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nika2105 [10]

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