Pivoting the Matrix

Result of pivoting the matrix 1 3 5 5 6 2 about the underlined element is?

Matrix Equations

Name the system that is equivalent to the matrix equation: x-2y=z=4 3x=y=z=1 x=y=2z=0

Inverse Matrixes

Find the inverse of the matrix: {1 2} {3 4}

Vertical line equations

What is the equation of a vertical line passing thorugh (-1,2) ?

y=mx=b problem

A manufacturer finds that the cost y of producing x units is given by the formula of the form y=mx=b. If it costs $1300 to produce 20 units and $1750 to produce 35 units, what is the fixed costs?