Solve the problem.Find the vector from A to the midpoint of BC.A = (4, -6, 9), B = (2, 4, 3), C = (-9, 7, -3)
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Find the solution or solutions, if any exist, to the system.
A. x = 1, y = -1, z = 1 B. x = 0, y = 0, z = 1 C. x = -1, y = 1, z = 1 D. x = 0, y = 1, z = 0
Mathematics
Find the direction angle ? for the given vector. Let 0° ? ? < 360° and round ? to the nearest tenth when appropriate.
A. 53.1° B. 117.1° C. 216.9° D. 233.1°
Mathematics
Use the order of operations to simplify the expression.
÷ 
? 
A. 
B. 
C. 
D. 
Mathematics
Solve.If a rock falls from a height of 90 meters above the ground, the height H (in meters) after x seconds can be approximated using the formula H = 90 - 4.9x2. What is the height of the rock after 4 seconds?
A. 11.6 m B. 1361.6 m C. 70.4 m D. -294.16 m
Mathematics