Find the value of the indicated sum.
A. 2 sin ? + 2 sin 
+ 2 sin 
+ 2 sin 
= 6 + 
B. 2 sin ? + 2 sin 
+ 2 sin 
+ 2 sin 
= 1 + 
C. 2 sin ? + 2 sin 
+ 2 sin 
+ 2 sin 
= 2 + 
+ 
D. 2 sin ? + 2 sin 
= 
Answer: C
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Factor out the GCF from the polynomial.32x9y8 + 72x6y4 + 56x2y2
A. 8(4x9y8 + 9x6y4 + 7x2y2) B. 8x2(4x7y8 + 9x4y4 + 7y2) C. 8x2y2(4x7y6 + 9x4y2 + 7) D. -8x2y2(-4x7y6 + 9x4y2 - 7)
Simplify the expression. Assume that all variables are positive when they appear.
A. -2x6y6 B. 2x4y4 C. -2x4y4 D. 4x4y4
Use the Pythagorean theorem to find the length of the unknown side of the right triangle. Express your answer as a simplified radical.
A. 4
B. 2
C. 4
D. 2
Give the meaning of the underlined digit.
9,283,647
A. 2 ? 1,000,000 = 2,000,000 B. 2 ? 100,000 = 200,000 C. 2 ? 10,000,000 = 20,000,000 D. 2 ? 10,000 = 20,000