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3 years ago

Help me! giving brainliest if u get it right, also show explanation (it isnt 34)

Mathematics

2 answers:

Volgvan3 years ago

5 0

Answer:

x = 34°

Step-by-step explanation:

Use property of exterior angles:

Exterior angle = sum of non-adjacent interior angles

Here we have:

∠D + ∠E = ∠EFG
∠EFG = ∠EFH + ∠HFG = 90° + 42° = 132°

So the equation is:

2x + 64° = 132°
2x = 132° - 64°
2x = 68°
x = 68°/2
x = 34°

If you think it is not 34°, then your question must be asking to find something else (e.g. angle D, which is 68°)

mr Goodwill [35]3 years ago

4 0

Hope this will help you

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The manufacturer of the ColorSmart-5000 television set claims 95 percent of its sets last at least five years without needing a

patriot [66]

Answer:

Step-by-step explanation:

Hello!

Your study variable is X: "number of ColorSmart-5000 that didn't need repairs after 5 years of use, in a sample of 390"

X~Bi (n;ρ)

ρ: population proportion of ColorSmart-5000 that didn't need repairs after 5 years of use. ρ = 0.95

n= 390

x= 303

sample proportion ^ρ: x/n = 303/390 = 0.776 ≅ 0.78

Applying the Central Limit Theorem you approximate the distribution of the sample proportion to normal to obtain the statistic to use.

You are asked to estimate the population proportion of televisions that didn't require repairs with a confidence interval, the formula is:

^ρ± $Z_{1-\alpha /2}$ * √[(^ρ(1-^ρ))/n]

$Z_{1-\alpha /2}$ = $Z_{0.995}$ = 2.58

0.78±2.58* √[(0.78(1-0.78))/390]

0.0541

[0.726;0.834]

With a confidence level of 99% you'd expect that the interval [0.726;0.834] contains the true value of the proportion of ColorSmart-5000 that didn't need repairs after 5 years of use.

I hope it helps!

7 0

3 years ago

Joshua has a bag of marbles. In the bag are 5 white marbles, 3 blue marbles, and 7 green marbles. Peter randomly draws one marbl

Step2247 [10]

Answer:

1 / 5

Step-by-step explanation:

Given that:

Number of white marbles = 5

Number of blue marbles = 3

Number of green marbles = 7

Required is the approximate probability of drawing 2 green marbles, Note that drawing is done without replacement :

Probability = required outcome / Total possible outcomes

Total possible outcomes = sum of all marbles = (5 + 3 + 7) = 15 marbles

First draw:

P(Green) = 7 / 15

Second draw:

Required outcome = 7 - 1 = 6

Possible outcomes = 15 - 1 = 14

P(green) = 6 / 14

Probability of drawing out two green marbles :

(7/15 * 6/14) = 42 / 210 = 1 / 5

6 0

3 years ago

Find the equation of circle having centre with

GaryK [48]

Step-by-step explanation:

Simply use the general equation of a circle to obtain its equation given the center. Because radius is 5 units, this may be referred to the 3-4-5 triangle, meaning the point on circumference is 3 units across in the x-direction and 4 units up in the y-direction.