Complete the sentence so the result is an identity. Let x be any real number.sin (x - 2?) = 
A. tan x
B. cos x
C. 1
D. sin x
Answer: D
Mathematics
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The following question(s) refer(s) to the capture-recapture method: n1 denotes the size of the tagged (captured) sample, n2 denotes the size of the second (recaptured) sample, and k denotes the number of tagged individuals in the second sample.If n1 = 250, n2 = 150, and k = 25, an estimate for the size of the population is
A. 2500. B. 1500. C. 3000. D. 15. E. none of these
Mathematics
Use the quadratic formula to solve the quadratic equation.x2 = -4x + 21
A. x = -7, 3 B. x = -7, - 3 C. x = 7, - 3 D. x = -21, 0
Mathematics
Solve the equation.-5x + 23 = -6x + 10
A. {-14} B. {-12} C. {-7} D. {-13}
Mathematics
Find an equation for the hyperbola described.Foci at (±9, 0); vertex at (-8, 0)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics