PLEASE HELP DESPERATE The average cost of producing a security system based on the total number of systems produced, x, is represented by the following function.
f(x)=400+20000/x
The mathematical range is all real numbers excluding 0, but the reasonable range is limited to y > __

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.

The surface area of the triangular prism is .

X+y=-4 x-y=2 use elimination with adding and subtraction