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Sever21 [200]
3 years ago
6

Some strategies of how to simplify an expression like 2x-5b+5x

Mathematics
1 answer:
bezimeni [28]3 years ago
7 0
<span>2x - 5b + 5x

<em>Arrange all the like terms together</em>
</span>2x + 5x - 5b 
<span>
<em>Combine all like terms</em>
7x - 5b</span>
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A chemical company makes up batches of copper sulfate solution by adding 250 kg of copper sulfate powder to 1000 liters of water
shepuryov [24]

Answer:

  • 0.07 kg

Step-by-step explanation:

  • <em>Assuming copper sulfate has same density as water</em>

<u>Chemical to water ratio as per given is:</u>

  • 250 kg : 1000 liter = 1 kg : 4 liter

Lab solution is 350 ml

<u>Converting to same ratio as above:</u>

350/(1 + 4) = 70 ml

  • 70 ml : 280 ml = 70 g : 180 ml = 0.07 kg : 180 ml

Answer is 0.07 kg

4 0
2 years ago
Зу + 5х = 15<br> help me. pls :D
Softa [21]
What’s the question like what does it say
3 0
2 years ago
Solve the following compound inequality. 5x+7 is less than or equal to -3 or 3x-4 is greater than or equal to 11
suter [353]

Answer:

the answer is A

Step-by-step explanation:

3 0
3 years ago
Thea has a key on her calculator marked $\textcolor{blue}{\bf\circledast}$. If an integer is displayed, pressing the $\textcolor
ch4aika [34]

Answer:

$9$

Step-by-step explanation:

Given: Thea enters a positive integer into her calculator, then squares it, then presses the $\textcolor{blue}{\bf\circledast}$ key, then squares the result, then presses the $\textcolor{blue}{\bf\circledast}$ key again such that the calculator displays final number as $243$.

To find: number that Thea originally entered

Solution:

The final number is $243$.

As previously the $\textcolor{blue}{\bf\circledast}$ key was pressed,

the number before $243$ must be $324$.

As previously the number was squared, so the number before $324$ must be $18$.

As previously the $\textcolor{blue}{\bf\circledast}$ key was pressed,

the number before $18$ must be $81$

As previously the number was squared, so the number before $81$ must be $9$.

4 0
3 years ago
What is 1.3 and 1 1/3 and 1.34 from least to greatest
Natalka [10]
1.3....same as 1.30
1 1/3 = 1.33
1.34

least to greatest : 1.3 , 1 1/3, 1.34
7 0
3 years ago
Read 2 more answers
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