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PSYCHO15rus [73]
3 years ago
7

A person incurs 5% loss by selling a laptop for $1140.At what price should the laptop be sold at to earn 5% profit​

Mathematics
1 answer:
djyliett [7]3 years ago
4 0

Answer:

$1256.85

Step-by-step explanation:

1140 (1.05) = $1197 cost

$1197* 1.05 = 5% profit

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Paul has two label-printing machines. Each machine can print 30 labels per minute. On day 1, only the first machine was used, an
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90+30x+30y. This is because the first day, 90 labels were printed, then you will use 30 times x to find how many minutes. This is the same for 30 times y. Youre trying to figure out how many minutes each machine printed for.
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3 years ago
2 factors that add to 6 but multiply to 60
hodyreva [135]

Answer:

The short answer is there isn’t.

Start by writing each of these as an expression:

x * y = 60

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Next, solve each for the same variable; in this case, y:

(x * y) / x = 60 / x

.: y = 60 / x

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.: y = 7 - x

Next, replace y of the second expression to the first

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.: 7 - x = 60 / x

Now, solve for x:

(7 - x) * x = (60 / x) * x

.: x * 7 - x^2 = 60

This is quadratic, so write it in the form of ax2 + bx + x = 0

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.: a = -1, b = 7, c = -60

Finally solve for b:

x = (-b +- sqrt(b^2 - 4*a*c)) / 2a

.: x = (-7 +- sqrt(7^2 - 4*-1*-60)) / (2 * -1)

.: x = (-7 +- sqrt(49 - 240)) / -2

.: x = (-7 +- sqrt(-191)) / -2

The square root of a negative value is imaginary and thus there’s no real answer to this problem.

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