Find the lengths of the sides of the triangle with the given vertices, and determine whether the triangle is a right triangle, an isosceles triangle, or neither.
?
?
A. 
; obtuse triangle
B. 
; right triangle
C. 
; right triangle
D. 
; acute triangle
E. 
; acute triangle
Answer: B
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Solve the problem.A cubic salt crystal expands by accumulation on all sides. As it expands outward find the rate of change of its volume with respect to the length of an edge when the edge is 
A. 0.6075 mm3/mm B. 0.27 mm3/mm C. 60.75 mm3/mm D. 6.08 mm3/mm
Find the equation of the line described, and express your answer in the specified form.Perpendicular to the line x = 7; passes through the point (2, 8); standard form
A. y = 2 B. y = 8 C. x = 2 D. x = 8
If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth.5-2
A. 
B. 25
C. -25
D. 
Find the vertex, focus, and directrix of the parabola with the given equation.y2 - 6y + 12x + 81 = 0
A. vertex: (3, 6) focus: (3, 3) directrix: y = 9 B. vertex: (3, 6) focus: (3, 9) directrix: y = 3 C. vertex: (-6, 3) focus: (-9, 3) directrix: x = -3 D. vertex: (-6, 3) focus: (-3, 3) directrix: x = -9