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Musya8 [376]
3 years ago
5

Jeff spent $7.50 at the store. He bought a notebook for $4.00. He also bought 10 pencils. How much did each cost?

Mathematics
2 answers:
Alisiya [41]3 years ago
8 0
Pencils cost 3.50 and notebook costs 4
DedPeter [7]3 years ago
7 0
Subtract 7.50 - 4.00 and dived that answer by 10
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How many liters of pure water must be added to how many liters of a 25% bleach solution to make 12 liters of a 15% bleach soluti
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Answer: 4.8 liters

Step-by-step explanation:

Let x liter of water is added with y liter of 25% beach solution.

Thus, According to the question,

x + y = 12  -------(1)

0% of x + 25 % of y = 15 % of 12

25 % of y = 15% of 12

25 y = 15\times 12

y = \frac{180}{25}

y = \frac{36}{5}

Put this value in equation (1),

We get,

x + \frac{36}{5} = 12

x = 12-\frac{36}{5}

x =\frac{60-36}{5}

x =\frac{24}{5}

Therefore, the quantity of water =  x =\frac{24}{5}=4.8\text{ liter}

And, the quantity of 25% bleach solution = y =\frac{36}{5}=7.2\text{ liter}

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Answer:

1. A = 2184 yd. P = 212 yd.

Step-by-step explanation:

1. To find the perimeter of an object you need to do this formula: 2L * 2W which is 2 times the length times 2 times the width.

To find the Area you have to do this formula: H * W which means height times width.

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2 years ago
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solmaris [256]
Answer
40
Explanation
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