Solve the equation.-9z + 8 + 7z = -3z + 13
A. 13
B. -13
C. 5
D. -8
Answer: C
Mathematics
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Use identities to write the expression as a single function of x or ?.tan 
A. 
B. -tan x
C. tan x
D. 
Mathematics
Solve the quadratic equation and simplify your answer. Use i notation for any complex numbers.
+ 
= -2
A. x = - 
, x = - 
B. x = - 
, x = 0
C. x = - 
, x = 
D. x = -2, x = - 
Mathematics
Find an equation for the graph.
A. y = 2 cos 
B. y = 4 cos (2?x)
C. y = 4 cos 
D. y = 2 cos (4?x)
Mathematics
Solve the rational equation.
= 
A. 
B. 
C. 
D. 
Mathematics