standard_description: Understand that the zero and identity matrices play a role in matrix addition and multiplication similar to the role of 0 and 1 in the real numbers. The determinant of a square matrix is nonzero if and only if the matrix has a multiplicative inverse.
problem_activity: Lola made lasagna for a church potluck. Below represents how much of the two pans of lasagna were eaten.
[IMG]
Lola says
$$3\over 4$$
of the lasagna was eaten. Milton, Lola’s brother, says
$$6\over 4$$
of the lasagna was eaten. Who is correct? Explain your answer.


aligns: no