Perform the indicated operation. Write the result in the form a + bi.(5 - 5i)(3 + 8i)
A. -25 - 55i
B. 55 + 25i
C. -40i2 + 25i + 15
D. 55 - 25i
Answer: B
Mathematics
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A. 
B. 
C. ln 
D. 
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Solve the problem.For what positive numbers will the cube of a number exceed 3 times its square?
A. x|0 < x < 3} B. {x|x > 3} C. x|x > 9} D. x|0 < x < 9}
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Use the law of cosines to show that, if 
, then 
.
What will be an ideal response?
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Solve the problem.A farmer has 400 yards of fencing to enclose a rectangular garden. Express the area A of the rectangle as a function of the width x of the rectangle. What is the domain of A?
A. A(x) = x2 + 200x; {x|0 < x < 200} B. A(x) = -x2 + 200x; {x|0 < x < 200} C. A(x) = -x2 + 400x; {x|0 < x < 400} D. A(x) = -x2 + 200x; {x|0 < x < 400}
Mathematics