Ming drew a triangle. the sum of the angles of the triangle is 180º.

(rest attached as images)

The second matrix

If we want to write a proper matrix to represent the given system of equations, we have to arrange it in order:

After this, we can write the matrix with the coefficients of each equation:

Being this, the matrix that represents the measure of each angle in Ming's triangle

175

step-by-step explanation:

2 inches x 10 miles = 200 miles - 3 inches = 175

graph b

step-by-step explanation:

one solution- graph a (clear intercepting point.)

no solution- graph b (they're parallel, there will never be a point of interception.)

infinite solutions- graph c (all points intercept.)