Answer:
Step-by-step explanation:
We can easily find the determinant of a matrix of which will be the cofactor of 2. Multiplying the diagonal elements of the matrix, we get. Now subtract the value of the second diagonal from the first, i.e, 48 – 3 = 45. Check the sign that is assigned to the number
The percent markup is 62.5%
The work is provided in the image attached.
Write the folowing in standard form and you well get
#1 is 5b
#2 is b−8x+<span>4</span>