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alexgriva [62]
3 years ago
14

Solve for x. -3x = -9

Mathematics
2 answers:
Romashka-Z-Leto [24]3 years ago
5 0

Answer:

3

Step-by-step explanation:

divide both sides by -3

-9/-3=3

Llana [10]3 years ago
4 0

Answer:

x = 3   i hope this helps!   :)

Step-by-step explanation:

given   -3x = -9

flip the negative signs to positive signs   3x = 9

divide both sides by 3   x = 3

answer   x = 3

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Set A of six numbers has a standard deviation of 3 and set B of four numbers has a standard deviation of 5. Both sets of numbers
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Given:

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\sigma_B=5

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To find:

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Solution:

Formula for variance is

\sigma^2=\dfrac{\sum (x_i-\overline{x})^2}{n}      ...(i)

Using (i), we get

\sigma_A^2=\dfrac{\sum (x_i-\overline{x}_A)^2}{n_A}

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Similarly,

\sigma_B^2=\dfrac{\sum (x_i-\overline{x}_B)^2}{n_B}

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Now, after combining both sets, we get

\sigma^2=\dfrac{\sum (x_i-\overline{x}_A)^2+\sum (x_i-\overline{x}_B)^2}{n_A+n_B}

\sigma^2=\dfrac{54+100}{6+4}

\sigma^2=\dfrac{154}{10}

\sigma^2=15.4

Therefore, the variance of combined set is 15.4.

7 0
3 years ago
PLS HURRY! WILL MARK BRAINLIEST
defon

Answer:

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Step-by-step explanation:

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2 years ago
Which statements are true about the fully simplified product of (b-2c)(-3b+c? Select two options.
SSSSS [86.1K]

Answer:

C) The simplified product has a degree of 2.

F) The simplified product, in standard form, has exactly 2 negative terms.

Step-by-step explanation:

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The game would cost $45
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