Solve the equation.
- 
= 
A. {
}
B. {-7}
C. {7}
D. {42}
Answer: C
Mathematics
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Decide whether the expression is or is not an identity.sin (A + B) + sin (A - B) = 2 sin A cos B
A. Identity B. Not an identity
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Simplify the expression.
- 
A. 
B. 4
C. 
D. 
Mathematics
Divide.
A. 30x5 + 27x2 + 18 B. 10x5 + 9x2 + 6 C. 10x5 - 9x2 - 6 D. 10x7 + 9x4 + 6x2
Mathematics
Write the word name for the decimal.0.49
A. forty-nine millionths B. forty-nine tenths C. forty-nine hundredths D. forty-nine thousandths
Mathematics