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Sauron [17]
3 years ago
8

a boy sold his bike and accessories for $168 if he received 3 times as much for the bike as for the accessories how much did he

receive for the bike?
Mathematics
1 answer:
Veronika [31]3 years ago
3 0
168/4 to get the bike and the accessories to get 42
42x3=126
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Answer:

x = -1 and y = 1/2

Step-by-step explanation:

Let u = 1/x, and v = 1/y

Then the pair of equations

-3/x + 4/y = 11

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Can be written as

-3u + 4v = 11 .................................(1)

u - 2v = -5......................................(2)

From (2)

u = 2v - 5 .......................................(3)

Substituting (3) into (1)

-3(2v - 5) + 4v = 11

-6v + 15 + 4v = 11

-6v + 4v = 11 - 15

-2v = -4

v = 4/2 = 2

Substituting this value of v in (3)

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u = 2(2) - 5

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That is

u = -1, v = 2

Since u = 1/x, and v = 1/y, we have

1/x = -1

=> x = -1

And

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=> y = 1/2

Therefore

x = -1 and y = 1/2

4 0
2 years ago
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maria [59]

Answer:

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Step-by-step explanation:

Multiply $19.99 by 6.

<em>$19.99 x 6 = $119.94</em>

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2 years ago
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marshall27 [118]

Answer:

D

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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give brainliest please.

hope this helps :)

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Help due 11:59!!!!!!!​
blagie [28]

Answer:

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5 0
2 years ago
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