Given matrix a is a 2x3 matrix, matrix c is a 2x1 matrix and axb=c. what are the dimensions of matrix b?

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.