Solve the equation.-2.1 = 14 - x
A. x = 11.9
B. x = 15.6
C. x = 16.1
D. x = 11.4
Answer: C
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Tell whether the points are the vertices of a parallelogram (that is not a rectangle), a rectangle, or neither.(-12, -10), (-10, 0), (3, 7), (1, -3)
A. Neither B. Rectangle C. Parallelogram
Use the geometric interpretation of slope (rise divided by run) to find the slope of the line. Then, by identifying the y-intercept from the graph, write the slope-intercept form of the equation of the line.
A. y = - x + 2 B. y = x - 2 C. y = - x - 2 D. y = x + 2
Rotate the axes so that the new equation contains no xy-term. Discuss the new equation.17x2 - 12xy + 8y2 - 68x + 24y -12 = 0
A. ? = 63.4°
+ 
= 1
ellipse
center at (
, - 
)
major axis is x'-axis
vertices at (4 + 
, - 
) and (-4 + 
, - 
)
B. ? = 63.4°
- 
= 1
hyperbola
center at (0, 0)
transverse axis is the x'-axis
vertices at (±4, 0)
C. ? = 26.6°
+ 
= 1
ellipse
center at (0, 0)
major axis is y'-axis
vertices at (0, ±4)
D. ? = 63.4°
x'2 = -16y'
parabola
vertex at (0, 0)
focus at (0, -4)
The position of a model train, in feet along the railroad track, is given by 
after t seconds.
?
Where is the train after 8 seconds?
?
A. 14 feet B. 72 feet C. 24 feet D. 17 feet E. 30 feet