Graph the equation. Identify the coordinates of the vertex.y = -x2 + 2x + 3
A. (1, 4)
B. (- 1, - 4)
C. (- 1, 4)
D. (1, - 4)
Answer: A
Mathematics
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Solve the problem.Find the mass of a sphere of radius 10 if 
k a constant.
A. 100k? B. 20,000k? C. 10,000k? D. 1000k?
Mathematics
Find the center of mass of a thin plate covering the given region with the given density function.The region between the x-axis and the curve y = 
, 1 ? x ? 2, with density ?(x) = 
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Mathematics
Provide an appropriate response. Two lengths of rope total 29 feet. One length is 7 feet longer than the other. What is the length of the shorter rope?
A. 20 feet B. 11 feet C. 18 feet D. 4 feet
Mathematics
Evaluate the function.Find f(7) when f(x) = 9x - 9
A. 72 B. 54 C. 0 D. 55
Mathematics