Simplify.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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In the following situation, state whether two variables are related in a way that might be described by a function. If so, identify the independent and dependent variables.You make a list of the titles of books in a public library and their copyright year.
A. Independend variable, copyright year; dependent variable, book title B. Independend variable, book title; dependent variable, copyright year C. does not describe a function
Mathematics
Evaluate the expression.(-7)2
A. -14 B. -49 C. 14 D. 49
Mathematics
Divide.
A. 
+ 
i
B. 
- 
i
C. 
- 
i
D. 
+ 
i
Mathematics
Solve the system by elimination.-7x - 5y = 50- 
x + y = 0
A. {(3, -5)} B. {(-5, -3)} C. {(5, -3)} D. {(-3, -5)}
Mathematics