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Trava [24]
3 years ago
14

Math:

Mathematics
1 answer:
ziro4ka [17]3 years ago
5 0

Answer:

<em>The shopkeeper purchased the pen at Rs. 50</em>

Step-by-step explanation:

<u>Equations</u>

Let's set

x = Original purchase price of the pen

The shopkeeper fixed the price of the pen to make a profit of 10%.

It means the retail price was going to be:

x + 10% x = x + 10x/100 = x + 0.1x = 1.1x

The retail price was fixed to 1.1x but the pen sold with a discount of Rs 7.50, thus the real retail price was

1.1x - 7.50

The shopkeeper lost 5% in the operation, thus:

1.1x - 7.50 = x - 5% x = x - 0.05x = 0.95x

The equation to solve is:

1.1x - 7.50 = 0.95x

Adding 7.50:

1.1x = 0.95x + 7.50

Subtracting 0.95x:

1.1x - 0.95x = 7.50

Operating:

0.15x = 7.50

Dividing by 0.15:

x = 7.50 / 0.15

x = 50

The shopkeeper purchased the pen at Rs. 50

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Vadim26 [7]

f(1) is 81.

<h3>What is a recursive function?</h3>
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To find  f(1):

f(n 1) = one-half(n).

f(3) = 9.

f(3) = 9If n = 1,f(2) = 9×3f(2) = 27If n = 0,f(1) = 27 ×3f(1) = 81

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3

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A)none <br> B)7<br> C)6i<br> D)I-6<br> E) - square of 7<br> ( look at the picture better)
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The correct answer is A). None

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The given quadratic polynomial has 3 roots and some of roots are x=\sqrt{7} and x=6+i

It is necessary to note that one of the roots is a complex number and root of complex number always in pair of the conjugate to each other.

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Answer:

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Step-by-step explanation:

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