A triangle with vertices at (x1, y1), (x2, y2), and (x3, y3) has area equal to the absolute value of D, where . Use this information to solve the problem.Use D to find the area of the triangle shown.

A. 14.0
B. 13.5
C. 14.5
D. 13.0


Answer: A

Mathematics

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Which of the following can be assumed to be true? ?

A.

?If , then b> c.


B.

?If , then b< c.


C.

?If , then .


D.

?The mean of  is .


E.

?None of the above are true.


Mathematics

Use Newton's method to approximate all the intersection points of the pair of curves. Some preliminary graphing or analysis may help in choosing good initial approximations. Round to six decimal places.y = cos x and y = 5x

A. x ? 0.085064 B. x ? 0.196164 C. x ? 0.197264 D. x ? 0.696164

Mathematics

Solve the inequality and graph the solution on the real number line. ? ?

A.  


B.


C.

?


D.

?


E.

?


Mathematics

Convert the equation to Cartesian coordinates.r = -9 csc ?

A. x = -9 B. -9y = 1 C. -9x = 1 D. y = -9

Mathematics