Thu 29 Sep, 2005 03:06 pm - The equation W = 120I - 12I^2 represents the power (W), in watts, of
a 120-volt circuit having a resistance of 12 ohms when a current (I) is
flowing through the circuit. What is the maximum... (view)
Thu 29 Sep, 2005 03:02 pm - What is the equation of a parabola that goes through points (0,1), (-1,6),
and (2,3)?
(1) y = x^2 + 1 (3) y = x^2 - 3x + 1
(2) y = 2x^2 + 1 (4) y = 2x^2 - 3x + 1 (view)
Thu 29 Sep, 2005 03:00 pm - Points A(-1,3) and B(4,1) are endpoints of a diameter of a circle.
The coordinates of the center of this circle are
(1) (3,4) (3) (1.5,2)
(2) (2,2) (4) (0,3.5) (view)
Thu 29 Sep, 2005 02:56 pm - After a dilation with respect to the origin, the image of point A( 3,4)
is A'( 9,12). What are the coordinates of the image of point B( 2,7)
after the same dilation?
I don't get this... (view)
Mon 26 Sep, 2005 07:19 pm - ok
Great work.
You said:
"therefore 3x - y + 3 = 0"
Book's answer is y = 3x + 3.
Let's see:
3x - y + 3 = 0
-y = -3x - 3
DIVIDE BOTH SIDES by -1.
y =... (view)
Mon 26 Sep, 2005 03:39 pm - The curve y = x/(1 + x^2) is called a serpentine. Find an equation of the tangent line to this curve at the point (3, 0.3). (view)
Mon 26 Sep, 2005 03:38 pm - The curve y = 1/(1 + x^2) is called a witch of Maria Agnesi. Find the equation of the tangent line to this curve at the given point
( -1, 1/2). (view)
