Solve the rational inequality and graph the solution set on a real number line. 
> 0
A. (-?, -9] ? [0, ?)
B. (-?, -9) ? (0, ?)
C. (-9, 0]
D. (0, ?)
Answer: B
Mathematics
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Simplify. Write your answer in the form a + bi, where a and b are real numbers.(-7 + 2i) + (13 + 7i)
A. -6 + 9i B. 6 + 16i C. 6 + 9i D. 13 + 9i
Mathematics
Solve by using the Superposition Theorem:
R1 = 10 Kê, R2 = 5 Kê, R3 = 20 Kê, R4 = 15 Kê, E1 = 30 V, and E2 = 45 V. Find the value of I3.
a. 0.54 mA
b. 1.91 mA
c. 0.28 mA
d. 0.82 mA
e. 1.36 mA
Mathematics
Draw a complete graph so that it has the given type of symmetry.Symmetric with respect to the y-axis
A. 
B. 
C. 
D. 
Mathematics
Write the complex number in rectangular form.5 cis 240°
A. - 
- 
B. - 
+ 
C. 
- 
D. - 
- 
Mathematics