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3 years ago

Calculate the mean of this data set.

Mathematics

2 answers:

Murljashka [212]3 years ago

5 0

Answer:

The mean of the data set is 5.

Step-by-step explanation:

Add the numbers in the data set:

6+3+16+12+21+8+9

= 75

Then divide by the amount of values in the data set:

75/15

sladkih [1.3K]3 years ago

3 0

Answer:

5. Ask for explanation if you want one. Hope this helps.

Step-by-step explanation:

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Express {x+1}{2x-3} as a trinomial.

Marizza181 [45]

Answer:

$2x^2 + 5x + 3$

Step-by-step explanation:

First, expand the original equation:

(x + 1)(2x + 3)

$2x^2 + 3x + 2x + 3$

Now simplify:

$2x^2 + 5x + 3$

And that's your answer!

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3 years ago

I’ll mark brainlest! pls help! :/

alexandr1967 [171]

Answer:

$9\sqrt{2}$

Step-by-step explanation:

d = $\sqrt{(5-(-4)^2+(5-(-4)^2 \\$

d = $\sqrt{(9)^2+(9)^2$

d = $9\sqrt{2}$

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3 years ago

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(2x-3)(3x+4) expand and simplify

elixir [45]

Answer:

6x² - x - 12

Step-by-step explanation:

Each term in the second factor is multiplied by each term in the first factor.

(2x - 3)(3x + 4)

= 2x(3x + 4) - 3 (3x + 4) ← distribute both parenthesis

= 6x² + 8x - 9x - 12 ← collect like terms

= 6x² - x - 12 ← in expanded form

5 0

3 years ago

Do this and help me pls free brainkest and 5 points

astraxan [27]

Answer:

I did my best

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Step-by-step explanation:

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3 years ago

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5x + 51 + 4x + 19 = 180

grin007 [14]

Answer:

12.22

Step-by-step explanation:

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2 years ago