Use an appropriate identity to find the exact value of the expression.cos (75°)
A. 
B. 
C. 
D. - 
Answer: B
Mathematics
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Subtract. Combine like terms, and write the answer in descending order.(-4c2 - 5c - 3) - (4c2 + 5c + 7)
A. -8c2 + 4 B. -8c2 + 10c + 10 C. 4 D. -8c2 - 10c - 10
Mathematics
Solve the problem.Of the largest cities in a certain country, 40 are located on its east coast. If its east coast has 8 times as many large cities as the west coast, how many large cities does its west coast have?
A. 320 B. 4 C. 15 D. 5
Mathematics
Find the sum of the given infinite geometric series if possible. Write the answer as a decimal number if appropriate.
A. 0.667 B. 1.5 C. 0.5 D. 0.333
Mathematics
Add.+ 
A. 1,301.974 B. 1,301.884 C. 1,301.983 D. 1,301.984
Mathematics