Solve the system of equations in three variables. 4xâ’3y+5z=2

2x+4yâ’7z=20

xâ’3y+8z=â’13

Draw the line of reflection that reflects △abc onto triangle δ a'b'c'

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

I’m really confused and need to learn this