Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Identify the property illustrated by the statement.(7 ? 5) ? 2 = 7 ? (5 ? 2)
A. Associative B. Commutative C. Distributive D. Identity E. Inverse
Mathematics
If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.? = 5 radians, A = 84 square meters, r = ?
A. 840 m B. 14.49 m C. 5.8 m D. 210 m
Mathematics
Using the horizontal-line test, determine whether the function is one-to-one.
A. one-to-one B. not one-to-one
Mathematics
Sketch the graph of the function and its inverse on the same coordinate axes.f(x) = 
A. 
B. 
C. 
D. 
Mathematics