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2 years ago

Mia is finally able to upgrade her cellphone.The one she wants costs $220 but she can get it for 60% off

Mathematics

2 answers:

Fiesta28 [93]2 years ago

8 0

Answer:

she gets it for 88 40% of 220 is 88

Step-by-step explanation:

kirill115 [55]2 years ago

3 0

Answer:

The answer would be $79.20

Step-by-step explanation:

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$\begin{vmatrix} x & y & z \\ -8 & 2 & -12 \\ u & v & w \end{vmatrix} = - \begin{vmatrix} x & y & z \\ u & v & w \\ -8 & 2 & -12 \end{vmatrix}$

Multiplying a single row by a scalar scales the determinant by the same amount:

$\begin{vmatrix} x & y & z \\ u & v & w \\ -8 & 2 & -12 \end{vmatrix} = -2 \begin{vmatrix} x & y & z \\ u & v & w \\ 4 & -1 & 6 \end{vmatrix}$

Then

$\begin{vmatrix} x & y & z \\ -8 & 2 & -12 \\ u & v & w \end{vmatrix} = -(-2) \begin{vmatrix} x & y & z \\ u & v & w \\ 4 & -1 & 6 \end{vmatrix} = 2\times(-6) = \boxed{-12}$

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(Log 3) / (Log 7) = 0.56457

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