I teach high school math at Greece Odyssey. I have been teaching for 7 years full time in the subjects of Geometry, Algebra II, and Intermediate Algebra. I am also comfortable with topics in PreCalculus.
Solve each system of equations.$4 a-2 b+8 c=30$$a+2 b-7 c=-12$$2 a-b+4 c=15$
$D=\left|\begin{array}{ll}{a} & {b} \\ {c} & {d}\end{array}\right|=$ _________.
A determinant can never equal 0.
If any row (or any column) of a determinant is multiplied by a nonzero number k, the value of the determinant remains unchanged.
find the value of each determinant.$$\left|\begin{array}{rr}{6} & {4} \\ {-1} & {3}\end{array}\right|$$
find the value of each determinant.$$\left|\begin{array}{rr}{-3} & {-1} \\ {4} & {2}\end{array}\right|$$