Discover Questions

When given the equations x-y=-1, 2y-x=27, x+y =11 how would you use row echelon form to get to the answer (5,6)? Difference between tubular secretion and counter current exchange? What volume of 0.222 M sulfuric acid contains 11.6 grams of sulfuric acid (H2SO4)? Include steps, please.? How do I find the tangent plane to surface?
I need to find the tangent plane at (3,4,-3) for the equation:
x^2+y^2-z^2-4xy+4xz=-68? Runway only 169m long. plane must reach ground speed of 39m/s what is the average acceleration?