Solve the equation by completing the square.x2 + 4x + 68 = 0
A. {2 ± 8i}
B. {6, -10}
C. {-2 ± 2
i}
D. {-2 ± 8i}
Answer: D
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Find the LCM.7 and 70
A. 490 B. 70 C. 7 D. 77
Find the slope of a line tangent to the curve of the given equation at the given point.y = 6
- x + 3; (36, 3)
A. 21
B. 
C. 3
D. - 
Determine the number that must be added to the expression to make it a perfect square trinomial. Then factor the expression.x2 - 20x
A. 100; (x + 10)2 B. 10; (x - 10)2 C. 100; (x - 10)2 D. 400; (x + 10)2
Solve the problem using your calculator.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. Use a graphing calculator to model the data with a linear function that predicts a student's course grade as a function of the number of hours spent in lab. Number of hours spent in lab Grade (percent) 10 96 11 51 16 62 9 58 7 89 15 81 16 46 10 51
A. y = 44.3 + 0.930x B. y = 0.930 + 44.3x C. y = 88.6 - 1.86x D. y = 1.86 + 88.6x