Solve the quadratic equation using the quadratic formula.x2 - 8x - 7 = 0
A. {4 + 
, 4 - 
}
B. {-4 + 
, -4 - 
}
C. {4 + 
, 4 - 
}
D. {8 + 
, 8 - 
}
Answer: A
Mathematics
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Perform the indicated operations.5
+ 
A. 5
B. 6
C. 6
D. 5
Mathematics
Find all values of x in the interval [0°, 360°) that satisfy the equation. Round approximate answers to the nearest tenth of a degree.7 cot2 x - 5 = 0
A. {70.5°, 109.5°, 180°} B. {103.2°, 145.2°, 283.2°, 325.2°} C. {49.8°, 130.2°, 229.8°, 310.2°} D. {51.8°, 128.2°}
Mathematics
Find a quadratic function that best fits the data. Give answers to the nearest hundredth.
A. y = -4.66x2 - 45.67x + 345.67 B. y = 0.54x2 + 60.05x + 912.48 C. y= -0.7803 + 98.39x - 419.89 D. y = -0.54x2 + 60.05x + 912.48
Mathematics
Divide.
A. 
B. x + 2 - 
C. x + 2 + 
D. x + 3
Mathematics