Solve by completing the square:
x^2+3x-9=0

A.) x=3√5/4 +3/2 or -3√5/4+3/2
B.) x=3√5/2 -3/2 or -3√5 /2 +3/2
C.) x=3√5 /2 -3/2 or -3√5/2 - 3/2
D.) x= 3 √ 5/4 -3/2 or -3√5 /4 -3/2

9. (y^-5)^10y^10 a. y^-60 b. y^60 c. y^-150 d. y^150 find the simplified form of each expression. 10. (4/7^5)^2 a.8/14^10 b.16/49^25 c.16/49y^10 d.8/14y^25 11. determine if the number 3.43 times 10^-6 is written in scientific notation. if not, explain. a. yes; the number is written scientific notation. b. no; the first factor is not a number between 1 and 10. c. no; it is not written as a number times a power of 10

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

Which values of m and b will create a system of equations with no solution? y=mx+b y=-2x+3/2