Simplify the expression involving rational exponents.815/4
A. 243
B. 2187
C. 6561
D. 19,683
Answer: A
Mathematics
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Solve the equation for x.y = 8 cos 3x
A. x = 3 arccos 
B. x = 
arccos 
C. x = 8 arccos 
D. x = 
arccos 
Mathematics
For the given angle of rotation and coordinates of a point in the xy-coordinate system, find the coordinates of the point in the x'y'-coordinate system.? = 45°, (5
, 0)
A. (0, -5) B. (-5, 5) C. (5, 0) D. (5, -5)
Mathematics
Solve the system using a graphing calculator capable of performing row operations. Give solutions with values correct to the nearest thousandth.0.6x + 4.9y - 
z = 7
x - 18y + 10z = -13x + 
y - 4.9z = 
A. {(2.084, -1.741, 3.529)} B. {(3.431, 1.930, 2.606)} C. {(-7.733, -5.025, 3.491)} D. {(8.110, 0.749, 2.619)}
Mathematics
Evaluate.5x2/7
A. 
B. 
C. 5
D. 
Mathematics