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Alchen [17]
2 years ago
11

Which shows all the like terms in the expression? 4x-3+7X+1

Mathematics
1 answer:
vodomira [7]2 years ago
7 0

Answer:

11x-2

Step-by-step explanation:

4x-3+7x+1

then

4x+7x-3+1

goes to

4x+7x-2

Answer: 11x-2

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What number is 6 more than 7?
11Alexandr11 [23.1K]

Answer:

13

Step-by-step explanation:

6 + 7 = 13

hope this helps, please mark me as brainliest!

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How do you change 14/20 into a decimal
lyudmila [28]
The answer is 0.7 Have a nice day   
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Evaluate the expression b2- 15 if b=9
Rudiy27

Answer:

3

Step-by-step explanation:

just plug in 9 to b

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4 0
2 years ago
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Petes boat can travel 48 miles upstream in 4 hours. The return trip takes 3 hours. Find the speed of the boat in still water and
tankabanditka [31]
So... hmm bear in mind, when the boat goes upstream, it goes against the stream, so, if the boat has speed rate of say "b", and the stream has a rate of "r", then the speed going up is b - r, the boat's rate minus the streams, because the stream is subtracting speed as it goes up

going downstream is a bit different, the stream speed is "added" to boat's
so the boat is really going faster, is going b + r

notice, the distance is the same, upstream as well as downstream
thus   \bf \begin{cases}
b=\textit{rate of the boat}\\
r=\textit{rate of the river}
\end{cases}\qquad thus
\\\\\\

\begin{array}{lccclll}
&distance&rate&time(hrs)\\
&----&----&----\\
upstream&48&b-r&4\\
downstream&48&b+4&3
\end{array}
\\\\\\

\begin{cases}
48=(b-r)(4)\to 48=4b-4r\\\\
\frac{48-4b}{-4}=r\\
--------------\\
48=(b+r)(3)\\
-----------------------------\\\\
thus\\\\
48=\left[ b+\left(\boxed{\frac{48-4b}{-4}}\right) \right] (3)
\end{cases}

solve for "r", to see what the stream's rate is

what about the boat's? well, just plug the value for "r" on either equation and solve for "b"
5 0
3 years ago
The volume of a rectangular prism can be represented by the expression 216x^3y^2. If the length is 8 y and the width is 9 x , wh
Nastasia [14]

Answer:

h= 216x^3y^2÷(8yx9X) = 3x^2y

3 0
3 years ago
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