Answer:
The standard form of a parabola is
y=ax2+ +bx+c, where a≠0.
To find the vertex, you need to find the x- and y-coordinates.
Whenever the questions asks for the probability and has "or" you have to add the two probabilities. In the same way, "and" implies multiplication. Therefore, the probability that someone swims is:

Probability that someone runs:

Thus, if you add them:

So, the probability that someone swims <em>or</em> runs is
1/2 or
50%.
It is given in the question that, PA is a radius and AB is the tangent segment .
And in a circle, radius and tangent are always perpendicular, it means they form 90 degree with each other . Or angle PAB is a right angle .
And we cant say anything about the length s of PA and AB, neither of PA and PB.
So out of the four options, correct option is the third option .
Answer:
x=2 y=-4
Step-by-step explanation:
-2x=y
-x-6x=-14
-7x=-14
x=2