Write the standard form of the equation of the circle with radius r and center (h, k).r = 2; (h, k) = (0, 0)
A. (x - 2)2 + (y - 2)2 = 2
B. (x - 2)2 + (y - 2)2 = 4
C. x2 + y2 = 2
D. x2 + y2 = 4
Answer: D
Mathematics
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Use properties of exponents to simplify the expression. Express answers in exponential form with positive exponents only. Assume that any variables in denominators are not equal to zero.(-2x4y-4)(-5x4y2)
A. 
B. 10x6y8
C. 10xy8
D. 
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Solve the equation.x + 4 = 9
A. 13 B. -13 C. -5 D. 5
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Write the ratio of corresponding sides for the similar triangles and reduce the ratio to lowest terms.
A. 
= 
= 
B. 
= 
= 
C. 
= 
= 
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Solve the equation. Round your answer to the nearest tenth. ? - 2.4x = 4
+ 8
A. -0.9 B. 0.6 C. -0.5 D. 0.3
Mathematics