Avolleyball reaches its maximum height of 13 feet, 3 seconds after its served. which of the following quadratics could model the height of the vollyball over time after it is served. select all that apply.

a: f(x)=2x^2+12x+5

b: f(x)=-2x^2+12x-5

c: f(x)=-2x^2-12x+5

d: f(x)=-2(x-3)^2+13

e: f(x)=-2(x+3)^2+13

Answer with explanation:

It is given that, a volleyball reaches its maximum height of 13 feet, 3 seconds after its served.

→If,we take height of volleyball along Y axis,and time along X axis,then Coordinates of Vertex can be represented as , (3,13).Because trajectory or path of Volleyball will be In the Shape of Parabola.

So,equation of parabola will be in the form of :

    →

                                        --------------------------------(1)

Negative sign indicates that ,the parabola is opening Downwards.

Or,

→If,we take height of volleyball along X axis,and time along Y axis,then Coordinates of Vertex can be represented as , (13,3).Because trajectory or path of Volleyball will be In the Shape of Parabola.

So, equation of parabola will be in the form of :

    →

                                     --------------------------------(1)

Negative sign indicates that ,the parabola is opening Downwards.

→→→If you will look at the options Carefully ,and try to match with options

or just check that , points (3,13) and (13,3) satisfies which equations,you will find that , Option B and Option D, that is , equation , B: f(x)=-2 x²+12 x-5 and D:  f(x)=-2(x-3)²+13 ,passes through, (3,13).

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.

the answer is b to that quesiton