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4 years ago

12 less than or equal to 7 + n

Mathematics

1 answer:

SOVA2 [1]4 years ago

3 0

Need more to the question

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What are the zeros of the quadratic function f(x) = 2x2 – 10x – 3?

Natasha2012 [34]

Answer:

$x=\frac{50+\sqrt{31}}{2},\frac{50-\sqrt{31}}{2}$ are zeroes of given quadratic equation.

Step-by-step explanation:

We have been a quadratic equation:

$2x^2-10x-3$

We need to find the zeroes of quadratic equation

We have a formula to find zeroes of a quadratic equation:

$x=\frac{b^2\pm\sqrt{D}}{2a}\text{where}D=\sqrt{b^2-4ac}$

General form of quadratic equation is $ax^2+bx+c$

On comparing general equation with b given equation we get

a=2,b=-10,c=-3

On substituting the values in formula we get

$D=\sqrt{(-10)^2-4(2)(-3)}$

$\Rightarrow D=\sqrt{100+24}=\sqrt{124}$

Now substituting D in $x=\frac{b^2\pm\sqrt{D}}{2a}$ we get

$x=\frac{(-10)^2\pm\sqrt{124}}{2\cdot 2}$

$x=\frac{100\pm\sqrt{124}}{4}$

$x=\frac{100\pm2\sqrt{31}}{4}$

$x=\frac{50\pm\sqrt{31}}{2}$

Therefore, $x=\frac{50+\sqrt{31}}{2},\frac{50-\sqrt{31}}{2}$

5 0

3 years ago

Read 2 more answers

Part 1: Record Information Spend a short amount of time (one to five minutes) doing your activity. Answer the following question

gizmo_the_mogwai [7]

Answer:

I think your gonna have to do this one on your own because this is a whole experiment. Just saying. :)

Step-by-step explanation:

7 0

3 years ago

Use the quadratic function to predict y if x equals 7.<br> y = 2x2 – 3x + 3

zheka24 [161]

Answer:

Step-by-step explanation:

$f(7)=2(7)^{2} -3(7)+3$

$= 2(49)-21+3\\=98-21+3\\=80\\$

7 0

4 years ago

Give examples of where the cubic decimeter is used around us?

pogonyaev

Answer:

A unit of volume equal to that of a cube having sides each one decimetre in length, equal to 10-3 cubic metres and 1 litre. Commonly used in fluid measure and for engine sizes.

3 0

3 years ago

PLEASE HELP!!! Thanks in advance!! Henry is a ringmaster for the circus. He stands inside a circular circus ring that has a circ

Andreas93 [3]

Circumference = 2pi * r

3pi = 2pi r divide away pi

3 = 2 r

(3/2) = r = 1.5 m

Area = pi ( r^2) = pi (1.5)^2 = 2.25 pi m^2 ≈ 7.07 m^2

cited from web2.0calc

3 0

3 years ago