Solve the problem.Evaluate 
at t = 9 for the function w = ey - ln x; x = t2, y = ln t.
A. 7
B. 
C. 
D. - 
Answer: C
Mathematics
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Simplify the expression.cos(x + ?) cos(? - x) + sin(x + ?) sin(? - x)
A. 1 B. cos(2x + 2?) C. 0 D. sin(2x + 2?)
Mathematics
Find the solution set for each inequality. Graph the solution set on a number line and write it in interval notation.|x + 16| > 9
A. (-?, -25) ? (-7, ?)
B. (-25, -7)
C. (7, 25)
D. (-7, ?)
Mathematics
Find the domain of the given function.f(x) = 
A. (- 
, ?)
B. [
, ?)
C. [-2, ?)
D. (2, ?)
Mathematics
Use the right triangle shown and find the missing length. If necessary, round to three decimal places. 
c = 13, a = 5
A. 4.243 B. 2.828 C. 12 D. 13.928
Mathematics