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3 years ago

Which statement explains how to calculate the mean of a set of data?

Mathematics

1 answer:

kobusy [5.1K]3 years ago

4 0

Answer:

I'm a bit late but the answer is C: Find the sum of all values and then divide by the number of values.

Step-by-step explanation:

Mean is just another name for average. To find the mean of a data set, add all the values together and divide by the number of values in the set. The result is your mean !

I hope this can help still ^-^!

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Verify that the roots of 5x²- 6x -2 = 0 are <img src="https://tex.z-dn.net/?f=%5Cfrac%7B3%20%2B%20%5Csqrt%7B19%7D%20%7D%7B5%7D%2

Mice21 [21]

Answer:

Proof below.

Step-by-step explanation:

Quadratic Formula

$x=\dfrac{-b \pm \sqrt{b^2-4ac} }{2a}\quad\textsf{when }\:ax^2+bx+c=0$

Given quadratic equation:

$5x^2-6x-2=0$

Define the variables:

a = 5
b = -6
c = -2

Substitute the defined variables into the quadratic formula and solve for x:

$\implies x=\dfrac{-(-6) \pm \sqrt{(-6)^2-4(5)(-2)}}{2(5)}$

$\implies x=\dfrac{6 \pm \sqrt{36+40}}{10}$

$\implies x=\dfrac{6 \pm \sqrt{76}}{10}$

$\implies x=\dfrac{6 \pm \sqrt{4 \cdot 19}}{10}$

$\implies x=\dfrac{6 \pm \sqrt{4}\sqrt{19}}{10}$

$\implies x=\dfrac{6 \pm2\sqrt{19}}{10}$

$\implies x=\dfrac{3 \pm \sqrt{19}}{5}$

Therefore, the exact solutions to the given quadratic equation are:

$x=\dfrac{3 + \sqrt{19}}{5} \:\textsf{ and }\:x=\dfrac{3 - \sqrt{19}}{5}$

Learn more about the quadratic formula here:

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3 0

1 year ago

Read 2 more answers

HELP ME PLZZZ ASAP PLZZZ

AnnyKZ [126]

I believe that B is the answer bc -2-1 is -3 but with absolute value it it's 3, whish is the correct distance

6 0

2 years ago

The surface area of a cube is 96 in.?. What is the volume of the cube?

salantis [7]

Answer:

Step-by-step explanation:

surface area of the cube =96

suppose one side of the cube = a

volume of the cube(V) =?

surface area = 6a^2

6a^2=96

a ^2 =96/6

a^2=16

a = 4

V= a^ 3

V=64.

brainliest plz :'D

3 0

2 years ago

Read 2 more answers

(x + 2) is raised to the fifth power. The third term of the expansion is:

WITCHER [35]

(x+2)^5
n = 3
r = 5
3rd term is 5x^3y^2

7 0

3 years ago

A wave with a frequency of 24Hz has a wavelength of 6 meters. At what speed will this wave travel?

Len [333]

Answer:144 meter per second

Step-by-step explanation:

Frequency =24 hertz

Wavelength =6 meters

Speed =frequency x wavelength

Speed =24 x 6

Speed =144 meter per second

8 0

3 years ago