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Reika [66]
3 years ago
14

a shopkeeper bought 2 watches for rs 400. he sold them to gain 5% one and loss 5% on other. calculate his final gain or loss per

cent. if the selling price of both watches is same.​
Mathematics
1 answer:
sattari [20]3 years ago
3 0
He made no gain

He bought 2 watches for $400
400/2=200
Each watch was $200
He gained 5% on one watch
200•1.05=210
He lost 5% on the other
200•0.95=190
210+190=400
Therefore he neither made nor lost any money
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Are the graphs of the lines in the pair parallel? Explain.
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You need to convert the second equation to slope/intercept form. The first equation is in that form already. Then you can compare  slopes.

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An animal reserve has 40,000 elk. The population increases 11% a year. How long tell the population is equal to 80,000. If someo
Natasha2012 [34]

Answer:

7 years (This answer is to the nearest year)

Step-by-step explanation:

The way you could work this out is by trial and error. 11 % a year means that its population increases by 4400 annually. 40,000 X 1.11^1 gives you the amount it would be after one year (44000). I got the 1.11 because of the percentage (0.11) plus the amount you need to do percentage increase (1). Then all you do is keep on going up till you hit the number you need (80,000) after about 7 years the total would have hit 80,000 and would have actually went past it (83046)

6 0
3 years ago
Which subsets of numbers does -8 belong to?
Softa [21]

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Step-by-step explanation:

8 0
3 years ago
A father is 25 years older than his son. 10 years ago, he was six times as old his son. What are their present ages?​
RoseWind [281]

Answer:

Present age of son = 15 years

& Present age of father = 40 years

Step-by-step explanation:

  • Let the son's present age be x years

  • -> Father's present age = (x + 25) years

  • 10 years ago:
  • Son's age = (x - 10) years

  • Father's age = (x +25 -10) = (x +15) years

  • It is given that: 10 years ago father was six times as old as his son

  • -> x + 15 = 6(x - 10)

  • -> x + 15 = 6x - 60

  • -> x- 6x = - 60 -15

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  • -> Present age of son = 15 years

  • & Present age of father = 40 years.
3 0
2 years ago
Read 2 more answers
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