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nadya68 [22]
3 years ago
6

last year, sales at a book store increased from 5,000 to 10,000. This year, sales decreased to 5,000 from 10,000. what percentag

e did sales increase year? what percentage sales decrease this year?
Mathematics
1 answer:
Vesnalui [34]3 years ago
5 0
Increases and decreases are calculated by the change, divided by the old value.

For increase from 5000 to 10000, change is 5000, old value is 5000, so the increase is 5000/5000=100%.

For decrease from 10000 to 5000, change is -5000, old value is 10000, so the decrease is -5000/10000=-50%, but cite as 50% decrease, or increase of -50%.

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The length of a rectangular fenced enclosure is 12 feet more than the width. If Farmer Dan has 100 feet of fencing, write an ine
Kitty [74]
Answer:
length = 31 ft
width = 19 ft

Explanation:
Assume that the width of the rectangle is w.
We are given that the length is 12 ft more than the width. This means that the length of the rectangle is w + 12

The perimeter of the rectangle in this case would be:
perimeter = 2 (length + width)
perimeter = 2 (12 + w + w)
perimeter = 24 + 4w

Assume that Dan would use all 100 ft of fencing to surround the yard. This would mean that the largest perimeter is 100 ft.

Therefore:
perimeter = 24 + 4w
100 = 24 + 4w
4w = 100 - 24
4w = 76
w = 19 ft

Since we have calculated that the width of the yard is 19 ft, we can substitute to get the length as follows:
length = 12 + w
length = 12 + 19
length = 31 ft

Hope this helps :)
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Answer:

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Step-by-step explanation:

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