Add the real numbers. Write any improper fraction as a whole or mixed number where appropriate.
+ 
A. 
B. - 
C. 
D. - 
Answer: B
Mathematics
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Find the exact value of the expression.cos 240°
A. - 
B. 
C. - 
D. 
Mathematics
Use sum-to-product identities to rewrite the expression as a product.cos 6x + cos 4x
A. 2 sin 5x sin x B. 2 cos 5x sin x C. 2 cos 5x cos x D. 2 cos 5x
Mathematics
Solve the equation.
- 
= 1
A. {3, -1} B. {3} C. ? D. {-3, -1}
Mathematics
Write the equation in standard form for an ellipse or a hyperbola centered at (h, k).8x2 - 5y2 - 16x + 40y - 112 = 0
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics