Show that if a cb, then a = b ( b a ). show that if a c b, then a u (b \ a) = b. show, by example, that for sets a, b, and c, an b = an c does not imply b = c.

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8

i think 1: 2

step-by-step explanation:

answer: the first graph

step-by-step explanation:

- (2, -7)

- lines r and s and lines t and u must be parallel