Evaluate using any method.
Mathematics
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Find the exact value of the expression.sin 20° cos 100° + cos 20° sin 100°
A. 
B. 
C. - 
D. - 
Mathematics
Use the given graph of f(x) = ax2 + bx + c to solve the specified inequality.f(x) ? 0
A. x ? 3 B. x = 3 C. All real numbers D. No solutions
Mathematics
Simplify the expression. Assume all variables represent positive real numbers.
A. 5
B. 
C. 
D. 
Mathematics
Solve the problem.The temperature, t, in degrees Fahrenheit, of water 
65 + 
m where m is the number of minutes since heating began. How long will it take for the temperature of the water to reach 70 degrees Fahrenheit?
A. 4 min B. 20 min C. 7 min D. 10 min
Mathematics