Solve the system of equations by the substitution method.
A. {(8, 3)}
B. {(-3, 8)}
C. {(3, 8)}
D. ?
Answer: C
Mathematics
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Find cos(A - B).cos A = 
and sin B = - 
, where 
and 
.
A. 
B. 
C. 
D. - 
Mathematics
Write the fraction as a decimal. If necessary, use repeating decimal notation.
A. 0.187
B. 0.1
C. 0.18
D. 0.1875
Mathematics
Find the zeros of f(x), given that one zero is k.f(x) = x3 + 4x2 - 2x - 8
k = -4
A. -
, ±2
B. -4, ±
C. -
, ±
D. -4, ±2
Mathematics
Find the requested vector.v = -4i - 5j + k, w = -5i + 3j - kFind a vector orthogonal to both v and w.
A. -2i + 9j - 9k B. 2i - 9j - 37k C. -11i - 13j + 16k D. 5i - 5j + 35k
Mathematics