Answer:
Step-by-step explanation:
We have that the focus is at (p,0) and that the directrix is x=-p. Take the point (-p,0) of the directrix. We know that the vertex of the parabola is at the middle point ot the line segment that joins the points (p,0) and (-p,0). To get the middle piont, we take the average coordinate by coordinate. That is, the middle point is 
. The general formula of a parabola of vertex (h,k) that opens to the right or to the left is given by
Where |p| is the distance from the focus to the vertex. If the parabola opens to the right, then p>0 and p<0 otherwise. In our case, h =0=k, so we get that
Answer:
x + x + x + x - 1 - 1 = x + x + x - 1 - 1 - 1 - 1 - 1
- 4x + ( - 2 ) = 3x + ( - 5 )
Step-by-step explanation:
2nd answer is the correct answer.
Answer:
x=6
Step-by-step explanation:
12x + 6= 78
-6 -6
12x = 72
(Divide by 12)
72 divided by 12 is 6.
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The diagram I have attached illustrates the relationships between different sets of numbers, such as the real numbers, rational numbers, integers, and whole numbers. Each new bubble is totally inside the other one; i.e. the integer bubble is totally inside the rational bubble. This means that all integers are rational numbers. The same holds for the whole numbers to the integers; all whole numbers are integers.
