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2 years ago

PLEASE ANSWER. I WILL GIVE BRAINLIEST FAST

Mathematics

2 answers:

mr_godi [17]2 years ago

4 0

Answer:

It is a right triangle

Step-by-step explanation:

kobusy [5.1K]2 years ago

3 0

Answer:

Step-by-step explanation:

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What is the density of a brick

Dahasolnce [82]

While fire clay bricks have a density of 2400 kg/m3, for common red bricks it is 1900 kg/m3 . [

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2 years ago

Solve the inequality for 8w-35< 3−(5-4w) Simplify the answer as much as possible

Finger [1]

Answer:

w<33/4

Step-by-step explanation:

8w-35<3-(5-4w)

8w-35<3-5+4w

8w-35<-2+4w

8w-4w-35<-2

4w-35<-2

4w<-2+35

4w<33

w<33/4

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2 years ago

Solve for h Give an exact answer. 3h=7( 2/7− 3/7 h)−10

romanna [79]

Its -4/3
Thank You.
Pls mark Brainliest!

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2 years ago

"A cable TV company wants to estimate the percentage of cable boxes in use during an evening hour. An approximation is 20 percen

Marizza181 [45]

Answer:

The company should take a sample of 148 boxes.

Step-by-step explanation:

Hello!

The cable TV company whats to know what sample size to take to estimate the proportion/percentage of cable boxes in use during an evening hour.

They estimated a "pilot" proportion of p'=0.20

And using a 90% confidence level the CI should have a margin of error of 2% (0.02).

The CI for the population proportion is made using an approximation of the standard normal distribution, and its structure is "point estimation" ± "margin of error"

[p' ± $Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$ ]

Where

p' is the sample proportion/point estimator of the population proportion

$Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$ is the margin of error (d) of the confidence interval.

$Z_{1-\alpha /2} = Z_{1-0.05} = Z_{0.95}= 1.648$

$d= Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }$

$d *Z_{1-\alpha /2}= \sqrt{\frac{p'(1-p')}{n} }$

$(d*Z_{1-\alpha /2})^2= \frac{p'(1-p')}{n}$

$n*(d*Z_{1-\alpha /2})^2= p'(1-p')$

$n= \frac{p'(1-p')}{(d*Z_{1-\alpha /2})^2}$

$n= \frac{0.2(1-0.2)}{(0.02*1.648)^2}$

n= 147.28 ≅ 148 boxes.

I hope it helps!

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3 years ago

Gambar grafik fungsi kuadrat dari y=x²-x-6

sveticcg [70]

-x^2-x+y-6 Should be right
y=x^2-x-6 = x^2-x+y-6

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2 years ago