Factor by grouping.6 - 3r - 2t + rt
A. (2 + r)(3 - t)
B. (2 + r)(3 + t)
C. (2 - r)(3 + t)
D. (2 - r)(3 - t)
Answer: D
Mathematics
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and 
A. 
and 
B. 
and 
C. 
and 
D. 
and 
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Evaluate the integral by using multiple substitutions.
dy
A. 
+ C
B. 
+ C
C. 
+ C
D. 2 sin 
+ C
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Find the limit.
e-x2 - y2
A. e-8 B. e8 C. 1 D. 0
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Solve.x2 = 49
A. 24.5 B. 7 C. ±7 D. ±8
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