3. this question is all about the trace of a matrix, denoted tr(a). recall that the trace of a matrix is the sum of its diagonal entries. 21 and b=1-1 i (a) let a : : : |-2 ·1 and (b) prove that for any n x n matrices a and b, tr(ab)- tr(ba). (c) prove that if a is an n × n matrix and p is an invertible n×n matrix, then tr (pap-1) = . compute tr(ab) and tr(ba) tr(a).

What is sin 7x/4 ? i need on this urgent trig

Write an equation in slope intercept form of the line passes through the given point and is parallel to the graph of the given equation (0,0); y=3/8 x+2

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.