Choose the equation that matches the graph. 
A. y - 3 = 0
B. x + 3 = 0
C. y + 3 = 0
D. x - 3 = 0
Answer: B
Mathematics
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Decide whether or not the given equation is an identity.sin2 ? - cos2 ? = 1 - 2 cos2 ?
A. Yes B. No
Mathematics
Solve the problem.Median family income in Country X between 1990 and 1999 can be modeled by 
where x is the year. Determine symbolically when the median income was $42,754.
A. x ? 1994 B. x ? 1996 C. x ? 1998
Mathematics
Simplify. Do not use negative exponents in your answer.y-7? y-2
A. 
B. y9
C. 
D. 
Mathematics
Simplify. Assume that any variables are positive.
A. 13
B. 
C. 4
D. 
Mathematics