Solve the equation by using the square root property. Simplify all radicals.x2 + 4 = 53
A. {±7}
B. {7}
C. {26.5}
D. {±6}
Answer: A
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Solve the equation.0.54x + 0.5(7,000 - x) = 3,660
A. x = 4,000 B. x = 3,000 C. x = -3,000 D. x = 7,000 E. no solution
Find: a. The center and radius of the circle. b. The x- and y-intercepts of the graph of the circle.x2 + y2 + 2x - 4y - 1 = 0
A. a. center = (1, -2); radius = 
b. (-1 + 
, 0), (-1 - 
, 0), (0, 2 + 
), (0, 2 - 
)
B. a. center = (-1, -2); radius = 
b. (-1 + 
, 0), (-1 - 
, 0), (0, 2 + 
), (0, 2 - 
)
C. a. center = (-1, 2); radius = 
b. (-1 + 
, 0), (0, 2 + 
)
D. a. center = (-1, 2); radius = 
b. (-1 + 
, 0), (-1 - 
, 0), (0, 2 + 
), (0, 2 - 
)
Find the derivative of y with respect to the independent variable.y =log7
A. 
(sec ? csc ? - ln 9 -1)
B. 
(cot ? - tan ? - ln 9 -1)
C. 
D. e7(cos ? - sin ? - e?9?)
Solve the equation. Use natural logarithms. When appropriate, give solutions to three decimal places unless otherwise indicated.ln ex = 4
A. {4} B. {1.386} C. {2.000} D. {1.472}