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kherson [118]
2 years ago
14

Nana has a water purifier that filters 1/3 of the contaminates each hour

Mathematics
1 answer:
zavuch27 [327]2 years ago
4 0
The purifier filters 1/3 water
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Assume that y varies directly with x then solve y = 2.5 x = .5 when x = 20
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Step-by-step explanation:

y=2.5| ?

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It'll be criss-crossed then it'll be:-

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What is the area of this composite figure?<br>A. 135 cm2<br>B. 207 cm2<br>C. 249 cm2<br>D. 279 cm2
mariarad [96]

Answer:

249 cm^2

Step-by-step explanation:

This problem becomes easier if we subdivide the figure, find the areas of the resulting figures and then sum them up.

Draw a vertical line straight down from the edge marked "4 cm" towards the edge marked "18 cm."  The resulting rectangle on the left is 15.5 cm long and (18 - 7.5) cm wide, or 15.5 by 10.5 cm.  Its area is 162.75 cm^2.

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Last, add together these two subareas:  combine 86.25 cm^2 and 162.75 cm^2.  The total area of the composite figure is then 249 cm^2 (answer).

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