Divide.8.1 ÷ 0.9
A. 90
B. 72
C. 9
D. 7.2
Answer: C
Mathematics
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Solve. Then graph the solution.x2 + 6x + 14 ? 0
A. (-?, 0) ? (0, ?)
B. (-?, ?)
C. [-14, 14]
D. ?
Mathematics
Solve the problem.Solve the formula V = ?r2h + 
?R2h for r by writing it in the form ar2 + br + c = 0 and then using the quadratic formula.
A. r = ± 
B. r = ± 
C. r = ± 
D. r = ± 
Mathematics
Rationalize the denominator. Assume all variables represent positive real numbers.
A. 
+ 9
B. x - 9
C. 
- 9
D. x + 9
Mathematics
Simplify the expression. Use positive exponents. Assume variables represent nonzero real numbers.
2 ? 
3
A. 
B. 
C. 
D. 
Mathematics