Solve the equation. Identify the equation as an identity, an inconsistent equation, or a conditional equation.
= x
A. Identity, {all real numbers}
B. Identity, {x
}
C. Inconsistent, ?
D. Conditional, {12}
Answer: B
Mathematics
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Solve the equation by making an appropriate substitution.x4 - 40x2 + 144 = 0
A. {4, 36} B. {2, 6} C. {-2, 2, -6, 6} D. {-2i, 2i, -6i, 6i}
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Perform the indicated operation.9 pt - 2 pt 1 c
A. 6 pt 3 c B. 7 pt 1 c C. 11 pt 1 c D. 6 pt 1 c
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Use an appropriate identity to find the exact value of the expression.cos (285°)
A. - 
B. - 
(
+ 1)
C. - 
(
- 1)
D. 
Mathematics
Solve the inequality and express the solution set in interval notation. Graph the solution set on the real number line.
? 
+ 2
A. [-9, ?)
B. (9, ?)
C. (-?, 9]
D. [9, ?)
Mathematics