Choose the correct vertex of the quadratic function f(x) = 3x2 - 2x - 1.

vertex is

Step-by-step explanation:

f(x) = 3x^2 - 2x - 1

Given equation is in the form of f(x) = ax^2 + bx+c

a=3 , b=-2 , c=-1

To find x coordinate of vertex we use formula x= -b/2a

To find y coordinate of vertex plug in -1/3 in the place of x in f(X)

f(x) = 3x^2 - 2x - 1

So vertex is

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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