Asap!

given the simple statement, how many rows do we need to construct the truth table for the negation?

a. 1
b. 2
c. 3
d. 4

Solve the x in the equation x^2+14x+17=-96

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

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.