I need some help with 7th grade math. I BELIEVE IN YOU GUYS

Mathematics

1 answer:

shusha [124]3 years ago

3 0

Do you have the question or a picture so I can help out ? :)

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a family pass to the amusement park costs $54.using the distributive property , write an expression that can be used to find the

Mandarinka [93]

9 x 6 = 54 is this right I'll do distributive property next time

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3 years ago

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Allisa [31]

Answer:

Step-by-step explanation:

18+12-6

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2 years ago

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Help me find Sample variance and standard deviation

AnnZ [28]

First, find the mean. You'll need it to compute the variance.

$\bar x=\displaystyle\frac15\sum_{i=1}^5x_i=\dfrac{21+10+6+7+11}5=11$

The variance of the sample is then computed with the formula

$s^2=\displaystyle\dfrac1{5-1}\sum_{i=1}^5(\bar x-x_i)^2=\dfrac{(21-11)^2+\cdots+(11-11)^2}4=\dfrac{71}2=35.5$

The standard deviation is the square root of the variance, so

$s=\sqrt{35.5}\approx5.958$