Convert the angle in degrees to radians. Express answer as a multiple of ?.- 160°
A. - 
? radians
B. - 
radians
C. - 
radians
D. - 
radians
Answer: C
Mathematics
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The following expressions represent denominators of rational expressions. Find their LCD.r2 + 3r, 4r + 12, and r2 + 6r + 9
A. 4(r + 3) B. 4r(r + 3)2 C. 4(r + 3)2 D. r(r + 3)2
Mathematics
Factor the expression completely.A circular pool is surrounded by a concrete walk. The area of the concrete around the pool is 
A. ?(R - r)2 B. ?(R2 - r2) C. (?R + ?r)(R - r) D. ?(R + r)(R - r)
Mathematics
When possible, apply the distributive law and combine like terms.(-7)(9x + 9y) + 8(3x + 7y)
A. -126xy B. -39x - 7y C. -39x + 9y + 7 D. 2x - 7y
Mathematics
Solve the equation by completing the square.z2 + 12z + 18 = 0
A. 
B. 
C. 
D. 
Mathematics