Simplify the expression by combining like terms.- 
x + 
y - 
x + 
y
A. 
x + 
y
B. - 
x + 
y
C. - 
x + 
y
D. - 
x + 
y
Answer: D
Mathematics
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A. 540 sec B. 270 sec C. 216 sec D. 108 sec
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Rewrite the expression as a single trigonometric function using a double-angle identity.2 cos24? - 1
A. cos 4?
B. 2 sin 4?
C. 
sin 16?
D. cos 8?
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Find the area of the parallelogram determined by the given vectors. :  figure 1.png)
 figure 2.png)
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