Use half-angle identities to find the exact value of the expression.sin 22.5°
A. - 
B. 
C. 
D. - 
Answer: C
Mathematics
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Multiply the expressions, and simplify the results. Assume there are no zero denominators.
Mathematics
Write the solution set in interval notation.{x|x > -4}
A. (-?, -4) B. (-?, -4] C. [-4, ?) D. (-4, ?)
Mathematics
Solve the percent problem.In a local election, 37,700 people voted. This was a decrease of 11% over the last election. How many people voted in the last election?
A. 33,964 people B. 33,553 people C. 42,360 people D. 41,847 people
Mathematics
The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. Use the graph to answer the question.
What temperature was recorded at 2 p.m.?
A. 78 ° F B. 76 ° F C. 79 ° F D. 80 ° F
Mathematics