Solve for x, z,y
-x + y + 3z = -3
x - 2y - 2z = 8
3x - y - 4z = 6

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

To find the extreme values of a function f(x. y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x, y)=xy

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*