  PRE-ALGEBRA
ALGEBRA 1
GEOMETRY
ALGEBRA 2
TRIGONOMETRY
PRE-CALCULUS
CALCULUS    Algebra 2, 2008 PAGE: 220 SET: Exercises PROBLEM: 4
Please look in your text book for this problem Statement  The system equations are Equation (1) Equation (2)

The matrix  equation form is .

When, .

Multiply each side by .   Therefore solution matrix is . First find the determinant of  A = ad bc.    .

Therefore A-1 exists. The inverse of A is .

Substitute a = 5, b = , c = 8, d = 5 and ad bc = 49.  . Substitute the values of in the solution matrix .

Multiply each side by .       The solution is . TESTIMONIALS
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