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adoni [48]
3 years ago
13

What is 1/2+3/4= ...........

Mathematics
1 answer:
Mademuasel [1]3 years ago
3 0
To answer the calculation 1/2 + 3/4, you need to do the following:
 
1/2 + 3/4 = 2/4 + 3/4 = (2 + 3) / 4 = 5/4
 
This can be also written as 1\frac{1}{4}.
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2. CHEMISTRY How many liters of 15% acid and
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Answer:  

<h3>         26²/₃ liters of 15% acid and 13¹/₃ liters of 33% acid</h3>

Step-by-step explanation:

Concentration            Amount of             Amount

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    15%                                x                         0.15x

    33%                               y                         0.33y

    21%                              40                      0.21•40      

       

x + y = 40    ⇒  x = 40 - y

0.15x + 0.33y = 0.21•40

0.15(40 - y) + 0.33y = 0.21•40

6 - 0.15y + 0.33y = 8.4

  0.18y = 2.4

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x = 40 -  13¹/₃ = 26²/₃

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