Perform the indicated operation. Write the result in the form a + bi.8i + (-6 - i)
A. 6 - 7i
B. -6 + 7i
C. -6 + 9i
D. 6 - 9i
Answer: B
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Solve the problem.A vendor sells hot dogs and bags of potato chips. A customer buys 5 hot dogs and 5 bags of potato chips for $21.25. Another customer buys 3 hot dogs and 5 bags of potato chips for $16.25. Find the cost of each item.
A. $2.50 for a hot dog; $2.00 for a bag of potato chips B. $1.75 for a hot dog; $2.50 for a bag of potato chips C. $2.75 for a hot dog; $2.00 for a bag of potato chips D. $2.50 for a hot dog; $1.75 for a bag of potato chips
Find the probability.A lottery game has balls numbered 1 through 21. A randomly selected ball has an even number or a 10.
A. 
B. 
C. 
D. 10
Use the product-to-sum or sum-to-product identities to find an identity for the given expression. sin 30° cos 38°
A. 
(cos 68° + sin 8°)
B. 
(sin 68° - sin 8°)
C. 2(sin 68° - sin 8°)
D. 
(sin 8° - sin 8°)
Expand the expression using the Binomial Theorem.(x - 7)5
A. x5 - 35x4 + 490x3 - 3430x2 + 12,005x - 7 B. x5 - 35x4 + 980x3 - 6860x2 + 12,005x - 16,807 C. x5 - 35x4 + 980x3 - 6860x2 + 12,005x - 7 D. x5 - 35x4 + 490x3 - 3430x2 + 12,005x - 16,807