Solve the system of equations.

3x+4y+3z=9
3x+3y+3z=3
2x+4y+3z=8

a) (x=2, y=5, z=-7)
b) (x=1, y=6, z=-6)
c) (x=0, y=4, z=-5)
d) (x=3, y=4,z=-4)

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20