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horsena [70]
4 years ago
12

A group of students recycled 7 2/3 pounds of glass and 9 3/4 pounds of paper. How many pounds of glass and paper did the student

s recycle alltogether?
Mathematics
2 answers:
Andrew [12]4 years ago
8 0
Well, is namely just their sum, let's firstly convert the mixed fractions to "improper" and then add them,

\bf \stackrel{mixed}{7\frac{2}{3}}\implies \cfrac{7\cdot 3+2}{3}\implies \stackrel{improper}{\cfrac{23}{3}}
\\\\\\
\stackrel{mixed}{9\frac{3}{4}}\implies \cfrac{9\cdot 4+3}{4}\implies \stackrel{improper}{\cfrac{39}{4}}\\\\
-------------------------------\\\\
\cfrac{23}{3}+\cfrac{39}{4}\qquad \stackrel{LCD~of~12}{\implies }\qquad \cfrac{4(23)+3(39)}{12}\implies \cfrac{92+117}{12}
\\\\\\
\cfrac{209}{12}\implies 17\frac{5}{12}
Ber [7]4 years ago
3 0
9 9/12 + 7 8/12 = 16 17/12 which converts to your answer----> 17 5/12
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katen-ka-za [31]
Ok lets see if i can explain this properly. sorry it's long but i had to explain it properly 

A) to calculate the final value received at the end of a period of time when the percentage is known we divide the percentage by 100 to give it to us as a decimal ( lets call this "X". this value is then added to 1 to give 1+X. 
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Step-by-step explanation:

In pic

(hope this helps can I pls have brainlist (crown) ☺️)

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