2x - y = 5
x + 3y = 7
I'm assuming you mean the coefficient matrix.
![\left[\begin{array}{ccc}2&-1\\1&3\end{array}\right] =(2)(3)-(-1)(1)=6+1=7](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D2%26-1%5C%5C1%263%5Cend%7Barray%7D%5Cright%5D%20%3D%282%29%283%29-%28-1%29%281%29%3D6%2B1%3D7)
x + 3y = 7
I'm assuming you mean the coefficient matrix.
A store pays $130 for a tablet. The store sells the tablet for $325. Your classmate says that the markup is 250% because $325$13
0=2.5
$
325
$
130
=
2.5
. Is your classmate correct?
Yes or no
$
325
$
130
=
2.5
. Is your classmate correct?
Yes or no
1 answer:
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