Show that (p-q) - (r-s) and (p r)- (g s) are not logically equivalent. the dual of a compound proposition that contains only the logical operators v, ^, and-is the compound proposition obtained by replacing each v by i, each ^ by v, each t by f, and each f by t. the dual of s is denoted by s*

a

step-by-step explanation:

strong negative correlation

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

a 90 degree rotation across the the origin followed by a reflection across the x-axis.

step-by-step explanation: