What is the area of a rectangle with a base of 12 ft and height of 6 ft? *

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

What is r i 4.5+10r=-6.5 with work pls

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.