The best thing to do when finding conic equations from the focus and directrix is to sketch a little graph. When you do this, you can easily identify the vertex right in the middle and can determine if the parabola is vertical or horizontal since it must wrap around the focus. This way you know whether the x or the y is squared. When you sketch the focus and directrix, you will see the vertex is at (0,0) and the parabola is sideways, so the y is squared. now remember your formula is y^2=4px where p is the distance from the vertex to the focus, or you could write x=1/(4p)y^2. Now from 0 to -8 is -8 so that means 4p=-32. This gives you y^2=-32x or x=-1/32y^2. Thsi type of question will also be on your module exam and then the final exam so be sure to practice some:)
Answer:
width
Step-by-step explanation:
7/10= 7 divided by 10= 0.7
and 0.67 id greater than 0.7
Answer:
37
Step-by-step explanation:
f(4) just means use 4 for x. The table has all the x's across the top (sometimes they are in columns instead) The f(x) in the second row is the output that goes with each x. When x is 4, the f(x) is 37.
All is one math sentence:
f(4) = 37
Answer:
The answer to your question is the slope of line e is 
Step-by-step explanation:
If two lines are parallel they have the same slope.
If two lines are perpendicular their slopes are reciprocals and of different signs.
In this question, line d is parallel to line e, which means that they have the same slope.
Answer: 0.5-2.4x=12.5
Step-by-step explanation:
-2.4(-5)=12
0.5+12=12.5
