Scalar and Matrix Multiplication Answers

Given the linear system: 5x + 3y = 17-8x - 3y = 9What is the correct formula for the solution to the linear system?

x = y = ⇒ -3 z = ⇒ 4

x = y =

Solve this linear system using determinants: 2x + 3y = 6 −8x − 3y = 12 |A| = |Ax| = |Ay| =

⇒ 2

|A| = ⇒ -120 |Ax| = ⇒ -240 |Ay| = ⇒ 360 |Az| = ⇒ -480

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