{-3+y=8}{-x+y=2} solving linear system by graphing

Although changes result from business transactions, the equality of the fundamental bookkeeping equation must remain. t/f

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.