Pls i need help with math. solve the equations and combine like terms: -11x+10x+11-33=x+2x+100

10+20x-10=15x -5x+90

-3(4x+3)+ 4(6x+1)=43

5p-14=8p+4

-8(7x+6)= -17+9x

6(k+2) =9k-15

9(c-9)-3= -4(2c+4)

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

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.

What is the angle measure, or angle of depression, between this bird and the bird watcher?