Find the focus and directrix of the parabola with the given equation.11x2 = 28y
A. Focus: 
, directrix: y = - 
B. Focus: 
, directrix: y = 
C. Focus: 
, directrix: x = - 
D. Focus: 
, directrix: y = - 
Answer: D
Mathematics
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Identify the form of the argument and state whether the argument is valid or invalid.If the bell rings, then we answer the door.The bell rings. Therefore, we answer the door.
A. Disjunctive syllogism; valid B. Fallacy of the converse; invalid C. Fallacy of the inverse; invalid D. Law of detachment; valid
Mathematics
Find the indicated tax rate.PercentPer $1007.11%
A. 71.1 B. $0.71 C. $71.10 D. $7.11
Mathematics
Solve.36x2 = 9
A. 
B. 
C. 
, - 
D. 
, - 
Mathematics
Solve.x2 + y2 = 164x2 + 9y2 = 36
A. 
, 
, 
, 
B. 
, 
C. 
, 
D. 
, 
, 
, 
Mathematics