Solve by completing the square to obtain exact solutions.10x2 + 21x + 9 = 0
A. - 
, - 
B. 
, 
C. 
, 
D. - 
, - 
Answer: D
Mathematics
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Use estimation to determine which calculation is incorrect.
A. 
B. 
C. 
D. 
Mathematics
Provide an appropriate response.
and 
__________.
A. coincide B. intersect C. are perpendicular D. are parallel
Mathematics
Solve the problem.Andy has some $10 bills and some $20 bills in a shoebox under his bed. He has a total of 38 bills worth a total of $510. How many $20 bills does he have?
A. 12 $20 bills B. 10 $20 bills C. 13 $20 bills D. 15 $20 bills
Mathematics
Provide an appropriate response.Suppose f is a linear function with slope -3 and f(2) = 5. Find f(x).
A. f(x) = -3x + 11 B. f(x) = -3x + 7 C. f(x) = -3x + 5 D. f(x) = -3x + 13 E. f(x) = -3x + 2
Mathematics