Simplify by factoring out the given factor.8k-3 + k-7; k-7
A. k-7(8k-4 + 1)
B. k-7(8k5 + 1)
C. k-7(8k4 + 1)
D. 8 k-7(k4 + 1)
Answer: C
Mathematics
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Find the exact value of the sum.cos 105° - cos 15°
A. 
B. - 
C. 
D. - 
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Write the number in trigonometric form. Let 0° ? ? < 360°.8
+ 8i
A. 16(cos 60° + i sin 60°) B. 16(cos 30° + i sin 30°) C. 16(cos 300° + i sin 300°) D. 16(cos 330° + i sin 330°)
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Determine whether the given point is on the graph of the equation.Equation: y = x4 - 
Point: (0, 0)
A. No B. Yes
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Tom is leading a workshop for 15 people. He wants each person to meet every other person (shake hands once). How many handshakes occur? ?
A. 213 B. 105 C. 98 D. 210 E. 108
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