Use identities to find the indicated value for each angle measure.tan ? = 
, sin ? < 0
Find cos(2?).
A. 
B. 
C. - 
D. - 
Answer: A
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Find the product.(6x + 4 + 7y)2
A. 36x2 + 48x + 84xy + 56y + 49y2 B. 36x2 + 24x + 16 + 42xy + 28y + 49y2 C. 36x2 + 84xy + 49y2 D. 36x2 + 48x + 16 + 84xy + 56y + 49y2
Factor out the GCF from the polynomial. If the GCF is 1, write prime.12m7 + 6m5 - 8m2
A. prime B. m2(12m5 + 6m3 - 8) C. 2(6m7 + 3m5 - 4m2) D. 2m2(6m5 + 3m3 - 4)
Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form. x + y + z = 14 x - y + 5z = 245x + y + z = 30
A. (5, 4, 5) B. No solution C. (4, 5, 5) D. (5, 5, 4)
For the given functions f and g, find the requested function and state its domain.f(x) = 
; g(x) = 5x - 8Find 
.
A. 
(x) = 
; 
B. 
(x) = 
; 
C. 
(x) = 
; {x|x ? 0}
D. 
(x) = 
; {x|x ? 0}