Solve the system of equations using substitution.
A. x = 
, y = 3
B. x = 
, y = 9
C. x = 3
, y = 
D. x = 9, y = 
Answer: C
Mathematics
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Use the inverse trig functions to express the angle in terms of the indicated unknown side. 
Express angle A in terms of b. Use one of the inverse trig functions tan-1, sin-1, or cos-1.
A. A = cos-1 
B. A = tan-1 
C. A = sin-1 
D. A = sin-1 
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Find the derivative of the function at the given point in the direction of A.
A. - 5.615234375e+09
B. - 
C. - 
D. - 5.37109375e+09
Mathematics
Find the absolute value.|0|
A. 2 B. 0 C. -1 D. 1
Mathematics