Suppose A is an m-by-n matrix and C is an n-by-p matrix. Prove that.AC /j; D Aj; Cfor 1 j m. In other words, show that row j of AC equals(row j of A) times C.

MATH121 Chapter 2 Notes LESSON 2.1 – Linear Equations in One Variable Example 1. 6(5x - 5) = -31(3 - x) (Multiply 6 and 5x, and 6 and -5) (Multiply -31 and 3, and -31 and –x) 30x - 30 = -93 + 31x (Get similar values on same sides) -x = -63 (Divide by -1 to get x by...