Solve the equation by completing the square.x2 + 4x + 8 = 0
A. {2 ± 2i}
B. {-2 ± 2
}
C. {0, -4}
D. {-2 ± 2i}
Answer: D
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Factor by grouping.x2 + 8x + xy + 8y
A. (x - 8)(x - y) B. (x + 8)(x + y) C. (x + 8)(x - y) D. (x - 8)(x + y)
Provide an appropriate response.Find a cofunction equivalent to tan 
.
A. csc 
B. tan 
C. cot 
D. cot 
Write the product as one base with one exponent.y3 ? y12
A. y15 B. 2y36 C. y36 D. 2y15
Solve the problem.The number of family practice physicians in a certain country can be approximated by the equation 
where x is the number of years since 2010 and y is the number of physicians in thousands. Explain the meaning of the slope in this specific equation.
A. The slope, 
, means every 10 years, the number of family practice physicians in this country increases by 41 thousand.
B. The slope, 
, means every 10 years, the number of family practice physicians in this country decreases by 41 thousand.
C. The slope, 
, means every 41 years, the number of family practice physicians in this country decreases by 10 thousand.
D. The slope, 
, means every 41 years, the number of family practice physicians in this country increases by 10 thousand.