A box contains 20 balls bearing numbers 1, 2, 3, 4, . . . , 19, 20. A ball
is drawn at random from the box. The
probability that the number on the ball
is a two digit prime number is

i think the answer is b

the answer is "add 2y and y"

step-by-step explanation:

you need to collect the like terms first.

h is the x-coordinate of the vertex

step-by-step explanation:

we have

in this function

the point represent the vertex of the function

so

h is the x-coordinate of the vertex

k is the y-coordinate of the vertex

      2

  2 is to go somewhat to the top right of a because it is squared    

v= a h/3