The equation for quiz 5 question # 1 are as follow

10x+ 3y+10z=5

8x-2y+9z=5

8x+y-10z=5

And they are asking

What is the cofactor matrix of the coefficient matrix?

What is the classical adjoint of the coefficients matrix?

What is the inverse of the coefficient matrix

Therefore;

[10 3 10][5]

8 -2 9 5

8 1 -10 5

For quiz 4

A death body was found within a closed room of a house in Amityville NY where the temperature was a constant 70•F. At the time discovery, the core temperature of the body was determined to be 86•F. One hour later a second measurement showed that the core temperature of the body was 80•F assume the time of death corresponds to t=0 and that the core temperature at that time was 98.6•F.

A equation has to be derived from the above statement. And solve the following

a) determine how many hours elapsed before the body was found?

b) As is the case in these unprecedented times, evidence indicated the dead person was positive for COVID -19 and was running a fever of 102•F at the time of death. Repeat the determination steps for this case. Using same derived equation.

Sample Solution