Perform the operations indicated. Write your answer in simplest form.- 
÷ 
A. 
B. - 
C. 
D. - 
Answer: D
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Let v and w be two vectors in the plane with given magnitudes. The angle between v and w is ?. Find the expression. Round the answer to the nearest tenth.
= 11, 
= 9, ? = 70°
Find 
A. 24.1 B. 21.1 C. 17.6 D. -106.4
Solve the equation. Give an approximate solution to four decimal places.
10x = 5
A. {1.0000} B. {-0.2322} C. {-2.3219} D. {2.3492}
Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(
+ 
)(
- 
)
A. 
+ 
- 
+ 5
B. 
+ 
- 
- 5
C. 
+ 
+ 
+ 5
D. 
+ 
+ 
- 5
Solve the problem.Find the standard form of the equation of the circle. Assume that the center has integer coordinates and the radius is an integer. 
A. (x + 1)2 + (y - 2)2 = 9 B. x2 + y2 + 2x - 4y - 4 = 0 C. (x - 1)2 + (y + 2)2 = 9 D. x2 + y2 - 2x + 4y - 4 = 0