Answer the FRONT of the worksheet that was passed out yesterday! Warm-Up Answer the FRONT of the worksheet that was passed out yesterday!
Find the area of the Triangle (5, 9) Use a Determinant (9, 5) 1 2 5 9 (1, 2)
YOU TRY!!! Find the area of the triangle. = Square units
Solving a Matrix Equation X = A-1B
Solving Systems Using Inverse Matrices
Setting Up the Matrices Matrix A will be the coefficients of the system Matrix X will be the variables Matrix B will be constants (what the system of equations are equal to)
Example 1: Use matrices to solve the linear system Type in [A]-1 [B] Find the inverse (-1, 4)
Example 4: Use matrices to solve the linear system Type in [A]-1 [B] (2, 3, -2)
ODDS on the back of the worksheet! Practice ODDS on the back of the worksheet! 10 minutes!
Let’s apply this… You have $18 to spend for lunch during a 5 day school week. It costs you $1.50 to make lunch at home and $5 to buy lunch. How many times each week do you make a lunch at home? Type in [A]-1 [B] (2, 3) You make lunch at home 2 times a week.