Solve the system of equations using substitution.
A. x = -5, y = -1; x = 8, y = 
or (-5, -1), 
B. x = 5, y = 1; x = -8, y = - 
or (5, 1), 
C. x = 5, y = 1; x = - 
, y = -8
or (5, 1), 
D. x = -5, y = -1; x = 
, y = 8
or (-5, -1), 
Answer: B
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Determine if the equation is an identity.cos (A + B) + cos (A - B) = 2 sin A sin B
A. Yes B. No
Graph the function.f(x) = 
+ 1
A. 
B. 
C. 
D. 
Solve.A ball is dropped from a height of 5.0 m. On each upward bounce the ball returns to 
of its previous height. Find a general term an.
A. an = 25.0 (
)n-1
B. an = 5.0 (
)n-1
C. an = 5.0 (
)n-1
D. an = 5.0 (
)n+1
Find all complex zeros of the polynomial function, and write the polynomial in completely factored form.f(x) = x3 - x2 + 16x - 16
A. f(x) = (x - 1)(x + 1)(x + 16) B. f(x) = (x - 25)(x + i)(x - i) C. f(x) = (x - 1)(x + 4i)(x - 4i) D. f(x) = (x - 1)(x + 4)(x - 4)