Multiply. Write the result in the form a + bi.(5 + 4i)(9 + 5i)
A. 20i2 + 61i + 45
B. 25 - 61i
C. 65 + 11i
D. 25 + 61i
Answer: D
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Find the modulo class to which the number belongs for the given modulo system.21, mod 8
A. 5 B. 1 C. 2 D. 7
Find the partial fraction decomposition for the rational expression.
A. 
+ 
B. 
+ 
C. 
+ 
D. 
+ 
Solve the compound inequality and write the solution set using set-builder notation. Graph the solution set using a number line.3 - 2x ? 7 or 3x - 5 ? 1
A. {x
}
B. {x
}
C. {x
}
D. {x
or x ? 2}
Solve the problem.A triangle has a base of length 3x + 1 and a height of x + 6 and has an area of 45 square units. Find the length of base and height. (A = 
BH)
A. base = 3 units; height = 30 units B. base = 3 units; height = 15 units C. base = 10 units; height = 9 units D. base = 9 units; height = 5 units