Answer:
75
Step-by-step explanation:
the angles are vertical (I think that's the right term) so they are the same
<span>x2 +8x +4y +4 = 0
</span>4y=<span> -x2 -8x -4</span>y = -.25*x^2 -2x -1
a = -.25b = -2c = -1
x position of vertex:
h = -b / 2a
h = 2 / 2*-.25h = 2 / -.5h = -4
y position of vertex:
k = ah^2 + bh + ck = -.25*-4^2 + -2*-4 + -1k = -4 +8 -1k = 3
VERTEX = (-4, 3)**************************************************************************
x value of focus =x value of vertex = -4
y value of focus =(1 (-b^2 -4ac)) / 4a
a = -.25 b = -2 c =-1
y value = (1 (-4 -4*-.25*-1)) / 4*-.25
y value = (1 (-4 -4*-.25*-1)) / -1
y value = (1 -4 +1) / -1y value = (-2 / -1)y value = 2
focus value = (-4, 2)
Answer is the last one.
First you need to combine like terms.
9x + 11y + 13
A coefficient is the number that comes before the variable (which is y).
The coefficient for y is 11.
Constants are the numbers that do not have variables attached to them.
The constant is 13.
Hope this helps!
Answer:
B he used the incorrect formula for the volume of the prism
