Find the direction angles of the vector. Round to the nearest degree, if necessary.v = -4i - 12j - 6k
A. ? = 91°, ? = 94°, ? = 92°
B. ? = 108°, ? = 161°, ? = 118°
C. ? = 108°, ? = 157°, ? = 117°
D. ? = 107°, ? = 149°, ? = 115°
Answer: D
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Solve the formula for the given variable.V = lwh for w
A. w = Vlh
B. w = 
C. w = 
D. w = 
Write the x- and y-intercepts of the graph.
A. x-intercepts: 6, -6; y-intercepts: 8, -8 B. x-intercepts: 8, -8; y-intercepts: 6, -6 C. x-intercepts: 6, -6 D. y-intercepts: 8, -8
Solve.The amount of gas that a helicopter uses is directly proportional to the number of hours spent flying. The helicopter flies for 4 hours and uses 20 gallons of fuel. Find the number of gallons of fuel that the helicopter uses to fly for 6 hours.
A. 35 gallons B. 36 gallons C. 24 gallons D. 30 gallons
Find the product.(x + 2y)3
A. x3 + 8y3 B. x3 + 6x2y + 12xy2 + 8y3 C. x3 + 2x2y + 4xy + 4xy2 + 8y2 + 8y3 D. 3(x + 2y)