Rewrite this polynomials without the parentheses (3x-4x^2+8x^3)+(-6x+2x^4-5x^2)

6.(q^9)^2 a. 2q^18 b. q^18 c. q^81 d.q^11 7.(6q^6)^-4 a. 6q^1296 b. 1296q^2 c. 1/1296q^24 d. 6q^-24 8. what is the value of 12x^-3 y^-1 for x = -1 and y = 5? a. -12/5 b.-10 c.-0 d.5/12

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.

Find the solution of this system of equation -7x+y=-20 9x-3y=36