(a) Consider the system of equations 11х3 — Зх1 yi %3D - 7x1 – 6x2 – 5x3 y2 х> + 2х3 — 2х = y3 Rewrite this system of equations in the matrix form Cx = y. Write down the entries of x, C, and y explicitly. (b) Consider the function f (x1,x2,x3) = xỉ+3x1x2 – x2x3+x – 4x3 Rewrite f in the matrix form x Ax where A is a symmetric matrix. Write down the entries of x and A explicitly. (c) Calculate C × A'.

Find BA. A= BA= 3 7 2 B -6-3 3 0

et 4 Find d

uestic Given the circumference of the circle and the measure of the central angle ACB, find the length of arc BD. circumference = 12 feet; MZACB = 120° %3D The length of arc BD is feet. (Type an integer or a decimal.)