Question: Please help 10.3 #21 Solve each system of equations by using the inverse matrix method a- x + 4 y = 6 6 . x

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10.3 #21 Solve each system of equations by using the inverse matrix method a- x + 4 y = 6 6 . x - ay =8 ( 2x + 7y = 11 BX tay = - 1 10.4 #1 Evaluate the determinant. a ) - 1 5 2 . 5 0 - 3 # 13 Evaluate the determinant by expanding by cofactors . a. - 2 3 - 3 - 4 -2 D (#+ 47) Solve each system of equations by using Cramer's Rule. a .) 5 x + 4y 2 -1 b.) 7 x + 2y = 0 3 x - by = 5 (2x + y =- 3 C . 3X - 4y + 22 = 1 of x - Ytaz =-2 2x tay + 32 = -3

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