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1 year ago

Find the slope of the line that passes through the two points below (-4,4) (-3,9)

Mathematics

1 answer:

diamong [38]1 year ago

8 0

Answer:

Step-by-step explanation: this equation works when you are given two points

$\frac{y_{2}-y_{1} }{x_{2} -x_{1} } =slope$

$\frac{9-4}{-3-(-4)} =\frac{5}{-3+4} =\frac{5}{1}=5$

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Step-by-step explanation:

To calculate the mean and the variance of the number of successful surgeries (X), we first have to enumerate the possible outcomes:

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3) Right knee unsuccessful and left knee successful (X=1).

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4) Both surgeries are unsuccessful (X=0).

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Then, the mean can be calculated as the expected value:

$M=\sum p_iX_i=0.603*2+0.067*1+0.297*1+0.033*0\\\\M=1.206+0.067+0.297+0\\\\M=1.57$

The variance can be calculated as:

$V=\sum p_i(X_i-\bar{X})^2\\\\V=0.603(2-1.57)^2+(0.067+0.297)*(1-1.57)^2+0.033*(0-1.57)^2\\\\V=0.603*0.1849+0.364*0.3249+0.033*2.4649\\\\V=0.1115+0.1183+0.0813\\\\V=0.3111$

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