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. 35.0
B. 34.5
C. 34.0
D. 35.5
Answer: C
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Which of the following is a definition of concave figures? ?
A. ?All line segments connecting two vertices in the figure lie outside the figure. B. ?At least one line segment connecting two vertices in the figure lie outside the figure. C. ?All line segments connecting two vertices in the figure lie inside the figure. D. ?All line segments connecting two vertices in the figure lie both inside and outside the figure. E. ?None of the above.
Classify the statement as true or false.{10} ? {8, 10, 12, 14}
A. True B. False
Completely factor the polynomial.10y5 + 40y4+ 2y3 + 8y2
A. 2y2(5y2 + 1)(y + 4) B. 2y2(5y2 + 1)(y + 8) C. (10y4 + 2y)(y + 4) D. 2y2(5y2 - 1)(y - 4)
Determine whether the equation is quadratic.x2 - 2x - 4 = 0
A. No B. Yes