Decide whether or not the given equation is an identity.2 cos4 x - 3 cos2 x + 1 = sin2 x(2 cos2 x - 1)
A. Yes
B. No
Answer: B
Mathematics
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Simplify the algebraic expression.-3(x + 7) + 9x
A. 6x + 21 B. 6x - 21 C. -12x - 21 D. 12x + 21
Mathematics
Solve the absolute value equation.4
- 10 = 4
A. 
B. 
C. 
D. 
Mathematics
Perform the operation indicated. Simplify.
+ 
A. 
B. 
C. 
D. 
Mathematics
Find the equations of the system shown on the graphing calculator screen.10
-10
A. 3x - y = 9 5x + y = 7 B. x + y = 1 x - 3y = -9 C. 4x - y = -16 3x + y = -5 D. 5x + y = 7 x + 2y = -1
Mathematics