Multiply and simplify.
? 270
A. 
B. 30
C. 
D. 3
Answer: B
Mathematics
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Solve the equation by completing the square. Express any complex numbers using i notation.x2 + 18x = -71
A. x = -18 + 
B. x = 9 + 
C. x = -9 ± 
D. x = 9 ± 
Mathematics
Complete the identity.sin x (sin 2x + sin 4x) = ?
A. cos x (cos 2x + cos 4x)
B. cos x (cos 2x - cos 4x)
C. 
cos x (cos 2x + cos 4x)
D. 
cos x (cos 2x - cos 4x)
Mathematics
The given point lies on the graph of the unit circle and corresponds to a real number t. Find the value of the indicated trigonometric function of t.
Find cos t.
A. - 
B. 
C. 
D. - 
Mathematics
Rewrite the radical expression using rational exponents. Assume all variables represent nonnegative real numbers.
7
A. b-7/9 B. b-9/7 C. b7/9 D. b9/7
Mathematics