Factor the trinomial completely. If the trinomial cannot be factored, say it is prime.x2 + x - 20
A. prime
B. (x - 4)(x + 5)
C. (x - 5)(x + 4)
D. (x + 1)(x - 20)
Answer: B
Mathematics
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Write the standard form of the equation of the circle with radius r and center (h, k).r = 4; (h, k) = (0, 0)
A. (x - 4)2 + (y - 4)2 = 4 B. (x - 4)2 + (y - 4)2 = 16 C. x2 + y2 = 4 D. x2 + y2 = 16
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Evaluate the function.If r(x) = 
, find r
+ r(-10).
A. - 
B. 15
C. - 
D. 12
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Complete the square to write the function in the form 
f(x) = x2 + 5x + 6
A. f(x) = 
2 + 
B. f(x) = 
2 + 
C. f(x) = 
2 - 
D. f(x) = 
2 - 
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Use the change of base formula and a calculator to approximate the logarithmic expression. Round your answer to four decimal places.log2/319
A. 7.2619 B. 8.9261 C. -7.2619 D. -14.5225
Mathematics