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Andru [333]
3 years ago
6

Benji and Joel are raising money for their class trip by selling gift wrapping paper. Benji raises $15 by selling 4 rolls of red

wrapping paper and 4 rolls of foil wrapping paper. Joel raises $15 by selling 8 rolls of red wrapping paper and 2 rolls of foil wrapping paper. For how much are Benji and Joel selling each roll of red wrapping paper?
Mathematics
1 answer:
Ahat [919]3 years ago
4 0
The price for red paper = 1.25
the price for foil = 2.5
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Ella has 0.5 lbs of sugar. How much water should she add to make the following concentrations? Tell Ella how much syrup she will
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Answer:

Ella should add 32\dfrac{5}{6} lbs of water.

Total weight of syrup 33\dfrac{1}{3} lbs

Step-by-step explanation:

Weight:

Weight of sugar = 0.5 lbs.

Weight of water added = x lbs

Total weight = 0.5 + x lbs

Percentage:

0.5 + x  --  100%

0.5  --  1.5%

Write a proportion:

\dfrac{0.5+x}{0.5}=\dfrac{100}{1.5}

Cross multiply:

1.5(0.5+x)=0.5\cdot 100\\ \\0.75+1.5x=50\\ \\1.5x=50-0.75\\ \\1.5x=49.25\\ \\x=\dfrac{49.25}{1.5}=\dfrac{4,925}{150}=\dfrac{197}{6}=32 \dfrac{5}{6}\ lbs

Ella should add 32\dfrac{5}{6} lbs of water.

Total weight of syrup

32\dfrac{5}{6}+\dfrac{1}{2}=32\dfrac{5}{6}+\dfrac{3}{6}=33\dfrac{1}{3}\ lbs

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3 years ago
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5 0
3 years ago
Read 2 more answers
What is the missing reason in Step 8? 
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please show the full question. 
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3 years ago
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