Factor by grouping.6x2 + 8xy - 9xy - 12y2
A. (2x + 3y)(3x + 4y)
B. (2x - 3y)(3x + 4y)
C. (2x - 3)(3x + 4)
D. (6x - 3y)(x + 4y)
Answer: B
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and 
A. 2.751 × 106 km B. 4.217 × 107 km C. 42,170 km D. 2751 km
Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. -0.05 B. 0.05 C. 12 D. 0.5
Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students, B's to the next 25%, and C's to the next 42%. What is the bottom cutoff for a C grade? Round your answer to the nearest whole number.
A. 77 B. 63 C. 65 D. 68
Solve the problem.Find the distance from the point 
to the plane 
A. 
B. 
C. 
D. 