(1 point) Let x, y, z be (non-zero) vectors and suppose w = 3x + 2y – z. If z = -3x – 2y, then w = 6 X + Using the calculation above, mark the statements below that must be true. A. Span(w, x, y) = Span(w, y, z) B. Span(w, z) = Span(w, x) C. Span(w, X, Z) = Span(x, y, z) D. Span(w, x) = Span(y, z) E. Span(x, y) = Span(w, z)

Which of the following represents a number squared is equal to twenty more than nine times that number ? a) x squared = 9x + 20 b) x squared = 20x + 9 c) x squared > 9 + 20x d) x squared = 9 + x + 20

Acylinder has volume 45π and radius 3. what is it’s height?

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m