For which values of a does a a − 4
a + 4 a
have an inverse matrix?

A =  

Step-by-step explanation:

given,

Matrix =

A =

determinant of matrix

|A| = a×a - (a-4)(a+4)

|A| = a² - a² +16

|A| = 16

inverse of the matrix

to calculate inverse of two matrix interchange the term a₁₁ with a₂₂ and multiply the -ve with a₁₂ and a₂₁

the inverse is

A =  

$97520

step-by-step explanation:

add 6% to the value she got from selling the house.