Algebra
posted by mysterychicken .
Need help with these
6. Chase scored 14 points on Monday, and he doubled his score each day thereafter. How many points did he score on Thursday?
8. Find a solution to the following system of equations using elimination:
5x + y = 5
4x + 2y = 2
21. Factor completely: 6x^4  9x^3  36x^2 + 54x
a. 3x(x^2  6)(2x  3)
b. 3x(x^2 + 6)(2x + 3)
c. 6x(x^2  6)(2x  3)
d. 6x(x^2 + 6)(2x + 3)
30. Suppose the area of a square is x^2  6x + 9. What is the perimeter of the square?
Thanks
MC

6)112 8)x=4/3,y=35/3 30)p=12

Attempt problem 21 if you want help..what do they all have in common? That can be taken out. Post as new if you want it checked.