Find the standard-form equation for an ellipse which satisfies the given conditions.An ellipse centered at the origin having focus (
, 0) and directrix x = 
A. 
+ 
= 1
B. 
+ y2 = 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: A
Mathematics
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Solve the linear inequality. Other than ?, graph the solution set on a number line.5(4x + 5) - 4x < 4(6 + 4x) - 6
A. (-?, 5)
B. ?
C. (5, ?)
D. (-?, ?)
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Find the intervals on which the function is continuous.y = 
A. discontinuous only when x = -3 or x = 4 B. discontinuous only when x = 3 or x = 4 C. discontinuous only when x = 3 D. discontinuous only when x = -4 or x = 3
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Solve the problem.From a point on a river, two boats are driven in opposite directions, one at 6 miles per hour and the other at 9 miles per hour. In how many hours will they be 75 miles apart?
A. 5 hr B. 6 hr C. 7 hr D. 1 hr
Mathematics
Sketch the graph of the function.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics