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2 years ago

Please help me answer the question that’s right next to the red Transportation. Please explain how to solve as well.

Mathematics

1 answer:

lesya692 [45]2 years ago

3 0

694 miles is 1116.88 kilometers so 1116.88*60=67008

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3. A set of n = 18 pairs of scores (X and Y values) has SSX = 20, SSY = 80, and SP = 10. If the mean for the X values is MX = 8

Karo-lina-s [1.5K]

Answer:

a. Pearson Correlation

r= $\frac{1}{4}$ or 0,25

b. The regression equation is

$Y = 6+ 0,5 *X$

Step-by-step explanation:

a. Pearson Correlation

Using the equation for Pearson correlation:

$r = \frac{SP}{\sqrt{(SS_{x} * SS_{y})} }$

$r= \frac{10}{\sqrt{(20 * 80)} }$

$r=\frac{10}{\sqrt{1600} }$

$r=\frac{10}{40} =\frac{1}{4} = 0,25$

b. Regression

Using regression equation

1. $Y = a+ b *X$

2. $a= m_{y} - b* m_{x}$

3. $b= \frac{SP}{SS_{x} }$

So replacing first 'b' because is content in 'a' equation

$b= \frac{SP}{SS_{x} }$

$b= \frac{10}{20}$

$b= \frac{1}{2} = 0,5$

Knowing 'b' can know 'a' and complete the equation

$a= m_{y} - b* m_{x}$

$a= 10 - 0,5* 8$

$a= 6$

Replacing in the equation 1:

1. $Y = a+ b *X$

$Y = 6+ 0,5 *X$

3 0

2 years ago

Given the triangle below, what is m < B, rounded to the nearest tenth

aalyn [17]

Answer:

Therefore m∠ B is 42.1°

Step-by-step explanation:

Given:

In Δ ABC

AB = 15 = c

AC = 18 = b

∠ C = 34°

To Find:

∠ B = ?

Solution:

In Δ ABC We have Sine Rule as

$\frac{a}{\sin A}= \frac{b}{\sin B}= \frac{c}{\sin C}$

Substituting the given values we get

$\frac{b}{\sin B}= \frac{c}{\sin C}$

$\frac{18}{\sin B}= \frac{15}{\sin 34}\\\\\sin B=0.671\\\\\therefore B=\sin^{-1}(0.671)=42.14\°$

Therefore m∠ B is 42.1°

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2 years ago

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when comparing salaries,which unit rate is better is better: $3,250/month or $4,000/momth? explain answer

MA_775_DIABLO [31]

4,000/month because you would be getting $750 more than the other salary(that's what i think the answer is)

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3 years ago

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Kato buys a recliner on Saturday. If the original price is 350 dollars, how much does he get off the original price?

strojnjashka [21]

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3 years ago

Convert 52.68 feet per hour to inches per minute using dimensional analysis

e-lub [12.9K]

$\frac{52.68 ft}{hr} \cdot \frac{12 in}{1 ft} \cdot \frac{1 hr}{60 min} = 10.536 \frac{in}{min}$

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2 years ago