Classify the equation as a contradiction, an identity, or a conditional equation.2(4f - 10) = 8f - 20
A. Contradiction
B. Conditional
C. Identity
Answer: C
Mathematics
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Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.cos (x - ?) = cos x
A. 
B. 
C. - 
D. 0
Mathematics
Find the perimeter.
A. 26
B. 13
C. 9
D. 22
Mathematics
Solve.-5n = -25
A. -20 B. 20 C. 5 D. -5
Mathematics
Graph the linear function by plotting the x- and y-intercepts.0.4y = -0.8x + 1.6
A. intercepts:(-2, 0), (0, 4)
B. intercepts:(2, 0), (0, 4)
C. intercepts:(4, 0), (0, 2)
D. intercepts:( -2, 0), (0, -4)
Mathematics