Use a sum or difference identity to find the exact value.sin 115° cos 55° - cos 115° sin 55°
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Answer the question.Consider the linear equation in three variables x - y + z = 3. Find a pair of linear equations that, when considered together with the given equation, will form a system having infinitely many solutions.
What will be an ideal response?
Mathematics
Rewrite without rational exponents, and simplify, if possible.3431/3
A. 7 B. 49 C. 21 D. 14
Mathematics
Evaluate the expression without using a calculator.161/4
A. 16 B. 2 C. 32 D. 8
Mathematics
Determine the accuracy of the measurement; that is, give the number of significant digits for the measurement.4,822 m
A. 4 B. 5 C. 3 D. 6 E. 1
Mathematics