Use the substitution or elimination method to solve the system. If the system is dependent, write the solution in ordered pair form.
A. (x, -2x + 6)
B. inconsistent, ?
C. (5, -4)
D. (0, 6)
Answer: A
Mathematics
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Use the even-odd identities to find the exact value of the expression. cos (-60°)
A. 
B. - 
C. 
D. - 
Mathematics
In work with alternating current, complex numbers are used to describe current I, voltage E, and impedance Z. These three quantities are related by the equation E = IZ. Solve the equation E = IZ for the missing variable.I = 6 + 5i, E = 30 + 44i
A. Z = 
- 
i
B. Z = 
+ 
i
C. Z = - 
+ 
i
D. Z = 
+ 
i
Mathematics
List the elements of the set.If A = {-11, -9, -8, -7, -4} and B = {-11, -9, -8, -7}, list the elements of 
A. {-11, -9, -8, -7, -4} B. {-11, -9, -8, -7} C. ? D. {-4}
Mathematics
Write interval notation for the graph.
A. (-3, 1] B. [-3, 1) C. [-1, 3) D. (-1, 3]
Mathematics