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Dafna1 [17]
3 years ago
11

What is the exact distance from (−1, 4) to (6, −2)?

Mathematics
2 answers:
Studentka2010 [4]3 years ago
8 0
Same as last time:

d^2=(x2-x1)^2+(y2-y1)^2

d^2=(6--1)^2+(-2-4)^2

d^2=7^2+(-6)^2

d^2=49+36

d^2=85

d=√85  (85=5*7 and both 5 and 7 are prime so √85 cannot be simplified any further)

The exact distance is √85 units.  
aniked [119]3 years ago
7 0

Answer:

The distance is √ 85 units

Step-by-step explanation:

To find the exact value, all we will simply do is to use the distance formula to solve;

D =√ (x₂ - x₁)²  +  (y₂ - y₁)²

From the question given;

The points given are  (−1, 4)  and (6, −2)

so;   x₁  = -1         y₁ = 4      x₂ = 6      y₂ = -2

We can now proceed to substitute the formula into the equation

D = √ (x₂ - x₁)²  +  (y₂ - y₁)²

    =√ (6 - -1)²  +  (-2 - 4)²

    =√ (6+ 1)²  +  (-2 - 4)²

    =√ (7)²  +  (-6)²

    =√ 49  +  36

    =√ 85

     The distance is √ 85 units

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Step-by-step explanation:

a.  The table below shows the calculations:

                 X                (X-mean)^2

                1.7             0.0225

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                1.9                 0.0025

                2.0                 0.0225

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Sample size: n=4

The mean is:  \bar{x} = \frac{7.4}{4} = 1.85

The sample standard deviation, s = \sqrt{\frac{\sum \left ( x-\bar{x} \right )^{2}}{n-1}}=0.1291

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b. Degree of freedom: df = n-1 = 3

Critical value of t for 90% confidence interval is: 2.3534

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\Large\maltese\underline{\textsf{A. What is Asked}}

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