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Nuetrik [128]
3 years ago
7

Triangle RST has vertices located at R (2, 3), S (4, 4), and T (5, 0). Part A: Find the length of each side of the triangle. Sho

w your work. (4 points) Part B: Find the slope of each side of the triangle. Show your work. (3 points) Part C: Classify the triangle. Explain your reasoning. (3 points)
please im about to cri
Mathematics
1 answer:
deff fn [24]3 years ago
5 0

Answer:

(a) Side lengths

RS = \sqrt{5}     ST = \sqrt{17}    RT = \sqrt{18}

(b) Slope

RS = \frac{1}{2}      RT = 1      ST = -4

(c) Scalene triangle

Step-by-step explanation:

Given

R = (2,3)

S = (4,4)

T = (5,0)\\

Solving (a): Length of each side

This is calculated using distance formula

d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

So, we have:

RS = \sqrt{(4 - 2)^2 + (4 - 3)^2}

RS = \sqrt{5}

ST = \sqrt{(5 - 4)^2 + (0- 4)^2}

ST = \sqrt{17}

RT = \sqrt{(5 - 2)^2 + (0 - 3)^2}

RT = \sqrt{18}

Solving (b): The slope of each side

This is calculated using:

m = \frac{y_2 - y_1}{x_2 - x_1}

So, we have:

RS = \frac{4- 3}{4- 2}

RS = \frac{1}{2}

RT = \frac{0 - 3}{5- 2}

RT = \frac{ - 3}{- 3}

RT = 1

ST = \frac{0 - 4}{5- 4}

ST = \frac{- 4}{1}

ST = -4

Solving (c): Classify the triangle

In (a), we have:

RS = \sqrt{5}

ST = \sqrt{17}

RT = \sqrt{18}

None of the sides are equal;

The triangle is scalene

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4 years ago
The heights of men in a certain population follow a normal distribution with mean 69.7 inches and standard deviation 2.8 inches.
Mama L [17]

Answer:

a) P(Y > 76) = 0.0122

b) i) P(both of them will be more than 76 inches tall) = 0.00015

   ii) P(Y > 76) = 0.0007

Step-by-step explanation:

Given - The heights of men in a certain population follow a normal distribution with mean 69.7 inches and standard deviation 2.8 inches.

To find - (a) If a man is chosen at random from the population, find

                    the probability that he will be more than 76 inches tall.

              (b) If two men are chosen at random from the population, find

                    the probability that

                    (i) both of them will be more than 76 inches tall;

                    (ii) their mean height will be more than 76 inches.

Proof -

a)

P(Y > 76) = P(Y - mean > 76 - mean)

                 = P( \frac{( Y- mean)}{S.D}) > \frac{( 76- mean)}{S.D})

                 = P(Z >  \frac{( 76- mean)}{S.D})

                 = P(Z > \frac{76 - 69.7}{2.8})

                 = P(Z > 2.25)

                 = 1 - P(Z  ≤ 2.25)

                 = 0.0122

⇒P(Y > 76) = 0.0122

b)

(i)

P(both of them will be more than 76 inches tall) = (0.0122)²

                                                                           = 0.00015

⇒P(both of them will be more than 76 inches tall) = 0.00015

(ii)

Given that,

Mean = 69.7,

\frac{S.D}{\sqrt{N} } = 1.979899,

Now,

P(Y > 76) = P(Y - mean > 76 - mean)

                 = P( \frac{( Y- mean)}{\frac{S.D}{\sqrt{N} } })) > \frac{( 76- mean)}{\frac{S.D}{\sqrt{N} } })

                 = P(Z > \frac{( 76- mean)}{\frac{S.D}{\sqrt{N} } })

                 = P(Z > \frac{( 76- 69.7)}{1.979899 }))

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                 = 1 - P(Z ≤ 3.182)

                 = 0.0007

⇒P(Y > 76) = 0.0007

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Answer:

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8 0
3 years ago
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