Which statement is always true about a trapezoid?
1.it has 2 congruent sides.
2. it has 2 right angles
3. it has no congruent angles
4. it has exactly 2 parallel sides.

What’s the domain of this function? fastttt

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

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base