Simplify 9i(2+3i) show work simplify the expression (-5+2i)(3-4i) show work simplify 4i|-28|

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6

What is the ordered pair that represents the linear inequality y< 6x-4