To which sets or set below does the number 1/2 belong

a. rational numbers only

b. whole numbers only

c. integers and rational numbers only

d. whole numbers, integers and rational numbers.

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

W-16=-12 solve each one step equation plz

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.