Using a sum or difference identity, write the following as an expression involving functions of ?.tan 
A. -tan ?
B. 
C. tan ?
D. 
Answer: D
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Find the intersection.6x + 2y + 9z = -10, -9x - 9y - 8z = 10
A. x = 65t - 70, y = -33t - 30, z = 36t
B. x = 65t - 
, y = -33t + 
, z = -36t
C. x = -2340t - 70, y = 1188t + 30, z = 36t
D. x = -65t + 70, y = 33t + -30, z = 36t
Use synthetic division to find the quotient and the remainder. (x5 - 4x4 - 9x3 - 15x2 - 21x + 19) ÷ (x - 6)
A. Q(x) = x4 + 2x3 + 3x2 + 3x + 3 ; R(x) = 3 B. Q(x) = x3 + 2x2 + 3x + 3 ; R(x) = 1 C. Q(x) = x4 + 2x3 + 3x2 + 3x + 1; R(x) = 0 D. Q(x) = x4 + 2x3 + 3x2 + 3x - 3 ; R(x) = 1
Compute the determinant of the matrix by cofactor expansion.
A. -28 B. -100 C. 36 D. -36
Solve the problem. Round your answer to three decimals.What annual rate of interest is required to double an investment in 6 years?
A. 6.123% B. 12.246% C. 11.552% D. 20.094%