Simplify: (x2+6x+8) + (-4x2+11x-9)

Rectangle pqrs has length a and width 4b. the x-axis bisects ps and qr what are the coordinates of the vertices

What is the value of x in the following equation. -x ^3/2 = -27

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap