(1 point) Which of the following sets are subspaces of R3? A. {(x, y,z) | 3x−2y=0,7x+4z=0} B. {(4x−9y,−6x−8y,5x+8y) | x, y arbitrary numbers } C. {(x, y,z) | x, y,z>0} D. {(x, y,z) | 6x−5y+9z=−4} E. {(x, y,z) | x+y+z=0} F. {(x, x−3,x+2) | x arbitrary number }

Cindy uses 1-inch cubes to find the volume of a jewelry box shaped like a rectangular prism. she uses 780 cubes to completely fill the jewelry box with no gaps or overlaps. if the jewelry box is 13 inches long and 5 inches wide, how tall is cindy’s jewelry box?

Solve for x, y, and z. show all steps.

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x