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3 years ago

6

Eric’s average income for the first 4 months of the year is $1,450.25, what must be his average income for the remaining 8 month

s so that his average income for the year is $1,780.75?

1 answer:

netineya [11]3 years ago

6 0

Too harddd sorryyybxnskzmskndjwjnekkks

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Answer:

$|A_y|=\left|\begin{array}{cc}12&7\\ \\17&-51\end{array}\right|$

Step-by-step explanation:

You can use these Cramer's formulas to solve for x and y:

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where

$|A|=\left|\begin{array}{cc}12&-13\\ \\17&-22\end{array}\right|\\ \\ \\|A_x|=\left|\begin{array}{cc}7&-13\\ \\-51&-22\end{array}\right|\\ \\ \\|A_y|=\left|\begin{array}{cc}12&7\\ \\17&-51\end{array}\right|$

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$|A_y|=\left|\begin{array}{cc}12&7\\ \\17&-51\end{array}\right|$

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miskamm [114]

Is means equals
sum means to add
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