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chubhunter [2.5K]
3 years ago
11

Helppppp 15P!!

Mathematics
2 answers:
san4es73 [151]3 years ago
6 0

Answer:

First Drop: Proportional

Second Drop: cf

Third Drop: [I think] Segment Addition Postulate

Step-by-step explanation:

I just looked through several websites with the same question. I have come to a conclusion that these are perhaps correct. (I'm taking the test right now)

77julia77 [94]3 years ago
6 0

Answer:

1. Proportional.

2. ce

3. Segment Addition Postulate.

Step-by-step explanation:

By the angle-angle similarity postulate, △YXZ∼△YZQ and △YXZ∼△ZXQ.

The corresponding sides of two similar triangles are proportional.

Since similar triangles have  proportional sides, therefore

\frac{a}{c}=\frac{f}{a} and \frac{b}{c}=\frac{e}{b}

Solving the equation for a² and b² gives

a^2=cf and b^2=ce

The value of a² is cf and the value b² is ce.

Adding these together gives

a^2+b^2=cf+ce

Factoring out the common segment gives

a^2+b^2=c(f+e)

From the given figure it is clear that

c=f+e         (Segment Addition Postulate)

Using segment Addition Postulate, we get

a^2+b^2=c(c)

On simplification, we get

a^2+b^2=c^2

Therefore the required answers are 1. Proportional, 2. ce, 3. Segment Addition Postulate.

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People tend to evaluate the quality of their lives relative to others around them (Frieswijk et al., 2004). In one study, resear
Alborosie

Answer:

Step-by-step explanation:

Hello!

Research.

n=9 frail elderly were interview and compared to a fictitious person who was worse off then the interviewee, a life-satisfaction score was determined for each person.

18, 23, 24, 22, 19, 27, 23, 26, 25

Assuming that the population average score is μ= 20, the researchers think that the elderly in the sample are more or less satisfied than others in the general population.

a. You have the information of one sample, assuming this sample has a normal distribution and each elderly interviewed is independent, then the t-test of choice is a one-sample t-test.

b. and c. If you say that the elderly are "more or less" satisfied than the others, this means that they are either as satisfied as to the general population or not satisfied as to the general population. Symbolically:

H₀: μ = 20

H₁: μ ≠ 20

This is a two-tailed test, meaning, you will have two critical regions.

d.  

α: 0.05

Left critical value: t_{n-1;/\alpha 2} = t_{8; 0.025}= -2.306

Right critical value: t_{n-1;1-\alpha /2} = t_{8;0.975} = 2.306

e.

t_{H_0}= \frac{X[bar]-Mu}{\frac{S}{\sqrt{n} } } ~t_{n-1}

X[bar]= 23

S= 3

t_{H_0}= \frac{23-20}{\frac{3}{\sqrt{9} } }= 3

f.

Considering that the calculated t-value is greater than the right critical value, the decision is to reject the null hypothesis, so using a significance level of 5% you can conclude that the average life-satisfaction score of the elderly is different than 20.

I hope it helps!

7 0
3 years ago
There are 32 students in a class. Nine of those students are women. What percent are men?
QveST [7]

Answer:

72%

Step-by-step explanation:

you can divide part of a whole by the whole to get a decimal

this decimal is the percentage when you move the decimal 2 places to the right

32 - 9 = 23 men

23/32 = .72 (rounded)

.72 = 72%

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Step-by-step explanation:

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Solve for x. Show each step of the solution. 4.5(4 − x ) + 36 = 202 − 2.5(3x + 28)
ella [17]

Answer:

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Step-by-step explanation:


3 0
3 years ago
A right regular pentagonal prism has a base edge length 14 cm, and height 12 cm. Identify the volume of the prism to the nearest
maks197457 [2]

Answer:

4046.56 cm3

Step-by-step explanation:

The base is made by 5 isosceles triangles, with one side of 14 cm, and the opposite angle of \frac{360} 5 = 72°. Each of the other angle is \frac{180-72} {2} =54°. From there, you can calculate the height of each base triangle as in \frac {h} 7 = tan54 or 9.634...cm.

Your volume will be 5 * \frac  {(14 * 9.634)} 2 * 12 = 4046.56 cm^3

7 0
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