LetA={0, 1, 2}and the partial order relation R be defined on the set of A×A as follows: For∀(a, b),(c, d)∈A×A, (a, b)R(c, d)⇐⇒a≤c and b≤d (a) Draw the Hasse diagram for R.
(b) Write the minimal, maximal, least and greatest elements of R.

Which linear equations have an infinite number of solutions? check all that apply.  (x  –  3/7)  =  2/7(3/2x  –  9/14)8(x  +  2)  =  5x  –  1412.3x  –  18  =  3(–6  +  4.1x)(6x  +  10)  =  7(x  –  2)4.2x  –  3.5  =  2.1 (5x  +  8)

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Is a square always, sometimes, or never a parallelogram