Solve the quadratic equation using the quadratic formula.x2 + 6x - 5 = 0
A. {-1 - 
, -1 + 
}
B. {3 + 
}
C. {-3 - 
, -3 + 
}
D. {3 - 
, 3 + 
}
Answer: C
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Solve the problem.The graph depicts a relationship between scores achieved on an unspecified standardized test and family income. Suppose the score for a test is 485 when the family income is $25,000 and is 535 when the family income is $55,000. Let x be the income, in thousands, and y be the score of the test. Graph the two given pairs of incomes and scores. Assume that the relationship is linear. Draw a line though the two previous points. From your graph, estimates the score if the family income is $40,000. Label the axes, and show where the solution is located on the graph.
A. 
Standardized test score: 585
B. 
Standardized test score: 560
C. 
Standardized test score: 510
D. 
Standardized test score: 535
Translate the sentence into a mathematical equation. Be sure to identify the meaning of all symbols.The surface area of a sphere is 4? times the square of the radius.
A. If S represents the surface area and r the radius, then 4?S = r2. B. If S represents the surface area and r the radius, then S = ?r2. C. If S represents the surface area and r the radius, then S = 4?r2. D. If S represents the surface area and r the radius, then S = 4?r.
Graph the system of inequalities. Shade the region that represents the points of intersection.
A. 
B. 
C. 
D. 
Find the average.Ages of patients (in years) in a clinic: 17, 4, 23, 17 (Round to the nearest whole number)
A. 14 years B. 15 years C. 4 years D. 17 years