Solve the system by the method of substitution.
?
?
A. (-20, -40)
B. No solution
C. (20, 40)
D. 
E. 
Answer: B
Mathematics
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Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. 0.1 B. 9 C. -0.1 D. 0.2
Mathematics
Rationalize the denominator of each fraction.
A. 
B. 
C. 
D. 
Mathematics
Determine whether the relation is also a function.{(-8, -7), (-8, 9), (1, -6), (5, -4), (7, 5)}
A. yes B. no
Mathematics
Simplify the radical expression. Assume that all variables represent positive real numbers.
A. p
B. p4
C. 
D. p6
Mathematics