Discover Questions

Find the complement of the angle 3pi/7. Please show steps!? Could someone help me with these math problems? I can't figure them out. Solve the linear equation;
x+2y=15
y=-2x+0 9x-12y=-3
-12x+16y=4? Can reality itself be programmed by interacting with it - in particular asking questions that lead to where you're directing it to go? 7^(x+1) + 7^x + 7^(x-1) = 399, what is x? Name a class of annelids whose members may have protonephridia?