(9x2 + 9x2 + 5x + 1) = (3x+1) A. 3x²+2x-2
B. 3x2 + 3x + 1
C. 3x2-3x-1
D. 3x2 + 2x+1

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters .

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.