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Stells [14]
3 years ago
12

In the situation, simple interest is calculated yearly.

Mathematics
1 answer:
jeka57 [31]3 years ago
8 0
I believe the total interest is 3840.
(4 times .12) times 8000
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Solve the following system of equations for all three variables.
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Answer:

Step-by-step explanation:

-2x + 3y – 4z = 8    ----------------(I)

5x – 3y + 5z = -8    -----------------(II)

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Add equation (I) & (II) and thus y will be eliminated

(I)        -2x + 3y – 4z = 8

(II)        <u>5x – 3y + 5z = -8</u>    {Add}

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(II) * (-1)         -5x + 3y - 5z = +8

                     <u>7x – 3y + 3z = 8</u>   {Add}

                     2x         -2z   = 16   ---------------(B)

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(A) * 2          6x + 2z = 0

(B)                 <u>2x - 2z  = 16</u>   {Add}

                     8x         = 16

Divide both sides by 8

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                 y = -12/3

y = -4

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