Evaluate the expression.
?
Fill in the blank(s) with the appropriate word(s).
Answer: 8
Mathematics
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Solve the problem.Use the exact value cos 72° = 
and identities to find the exact value of sin 72°.
A. 
B. 
C. 
D. 
Mathematics
Solve the equation by changing it to exponential form.log2x = -4
A. x = -2?4
B. x = 
C. x = - (4)2
D. x = - 
Mathematics
Match the system of inequalities with a graph.4y - x ? 4,y + 3x ? 6,y ? 0
A. 
B. 
C. 
D. 
Mathematics
Find an approximate solution of the equation. Round the result to the second decimal place.5.56 - 3.25
= -8.49
A. 0.71 B. -1.90 C. 0.49 D. 3.11
Mathematics