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3 years ago

Help! can someone help me out on this?

Mathematics

1 answer:

Fynjy0 [20]3 years ago

6 0

Answer:

solve by substitution method

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Help if you do this you will get seven years of good luck if you don't you will get seven years of bad luck: (SAT Prep): Find th

KatRina [158]

Answer:

$Slope=\frac{7}{2}=3.5$

Step-by-step explanation:

Slope of line: $Slope\ of\ line\ passing\ through\ (x_1,y_1)\ and\ (x_2,y_2)\ is\ given\ by\ \frac{y_2-y_1}{x_2-x_1}$

$Here\ (x_1,y_1)=(\frac{2}{7},5)\\\\(x_2,y_2)=(10,39)\\\\Slope=\frac{39-5}{10-\frac{2}{7}}\\\\Slope=\frac{34}{\frac{68}{7}}\\\\Slope=\frac{34\times 7}{68}\\\\Slope=\frac{7}{2}=3.5$

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3 years ago

A sample of 2,500 people was asked how many cups of coffee they drink in the morning. You are given the following sample informa

Misha Larkins [42]

Answer: V(X) = 0.96

Step-by-step explanation: <u>Variance</u> is defined as the average of the squared difference from the sample or population mean.

For a discrete frequency distribution is calculated following the steps:

1) Determine expected value or mean:

$E(X)=\frac{\Sigma xf}{\Sigma f}$

$E(X)=\frac{0(700)+1(900)+2(600)+3(300)}{2500}$

E(X) = 1.2

2) Multiply frequency and the squared difference of x and expected value:

$f(x-E(X))^{2}$

$700(0-1.2)^{2}=1008\\900(1-1.2)^{2} = 36\\600(2-1.2)^{2} = 384\\300(3-1.2)^{2} = 972$

3) Add them:

$\Sigma [f(x-E(X))^{2}]$ = 1008 + 36 + 384 + 972 = 2400

4) Divide the sum per frequency total:

$V(X)=\frac{\Sigma [f(x-E(X))^{2}]}{\Sigma f}$

$V(X)=\frac{2400}{2500}$

V(X) = 0.96

The variance of the number of cups of coffee is <u>0.96</u>.

7 0

3 years ago

List the sides and angles of △GEF in order from smallest to largest.

Alex

Answer:

See below

Step-by-step explanation:

The smallest angle is opposite the smallest side.

Sides: GE, FG, FE

Angles F, E, G

3 0

3 years ago

Read 2 more answers

ANGLE OF ELEVATION, ANGLE OF DEPRESSION

Gekata [30.6K]

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \large \mathfrak{Together \: We \: Go \: Far}$

$\rule{70mm}{2.9pt}$

<h3>ANGLE OF ELEVATION</h3>

☞ An angle of elevation is the angle between the horizontal line of sight of the observer to the object above.

<h3>ANGLE OF DEPRESSION</h3>

☞ An angle of depression is the angle between the horizontal line of sight of the observer to the object below.

$- - - - - - - - - - - - - \: -$

Additional Information:-

☞ brainly.com/question/9817377

☞ brainly.com/question/21137209

$\rule{70mm}{2.9pt}$

~ $\large \mathfrak{MrHarold}$

3 0

2 years ago

Does a proportional relationship start at 0 ?

Elenna [48]

Hi I think the answer is no because I think it starts a two.

7 0

3 years ago

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