Gareth has just remolded his kitchen and wants to buy two stand-alone freezers. which brand of freezers will have a lower lifetime

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.

How can i differentiate this equation?

What is the expression equivalent to (3x^2-7)