3 years ago

What system of equations represents the graph?

Mathematics

1 answer:

il63 [147K]3 years ago

4 0

B. Because of the slope and where it the lines intersect the y axis

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The term coefficient refers to

Dmitry_Shevchenko [17]

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It refers to a numerical or constant quantity placed before and multiplying the variable in an algebraic expression.

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2 years ago

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

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

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3 years ago

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Vedmedyk [2.9K]

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3 years ago

If 72 = 12x, what does x equal?

CaHeK987 [17]

Answer:

x=6

Step-by-step explanation:

So, x is our unknown variable. An so you have to ask yourself, what times 12= 72? The answer would be 6, because 12x6=72

The proper way to do it, would be to divide 12/12 so you isolate the variable, and what you do to one side, you do to the other, so divide 72 by 12 and you get 6! Hope this helps!

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2 years ago

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2 years ago

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