Evaluate the expression x + y for the given values of the variables.x = 20, y = 13
A. 33
B. -7
C. -33
D. 7
Answer: A
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Evaluate.b1
A. 0 B. 1 C. b D. -1
Solve the problem.Determinants are used to show that three points lie on the same line (are collinear). If 
= 0,then the points (x1, y1), (x2, y2), and (x3, y3) are collinear. If the determinant does not equal 0, then the points are not collinear. Are the points 
, 
, and
collinear?
A. Yes B. No
The table shows the fraction of the world's surface land area taken up by each continent. Use the table to answer the question. Write your answer in simplest form. Continent Fraction of World's Surface Land Area North America 
South America 
Europe 
Africa 
Asia 
style="vertical-align: -17.0px;" /> Australia 
Antarctica 
Find the fractional part of the world's land area within the continents of Australia and Asia.
A. 
B. 
C. 
D. 
Find the center of mass of a homogeneous solid bounded by the paraboloid z= 25- x²- y² and z= 0.
What will be an ideal response?