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Anestetic [448]
3 years ago
9

A construction worker needs to put a rectangular window in the side of a building. He knows from measuring that the top and bott

om of the window have a width of 8 feet and the sides have a length of 15 feet. He also measured one diagonal to be 17 feet. What is the length of the other diagonal? A. 8 feet B. 15 feet C. 23 feet D. 17 feet
Mathematics
2 answers:
Len [333]3 years ago
6 0
17 feet opposite sides of a rectangle are equal
Dominik [7]3 years ago
6 0
D. 17 feet

same with the measuring one diagonal to be 17 feet.
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A survey asks a random sample of 2500 adults in California if they support an increase in the state sales tax from 7.50% to 7.75
Nadusha1986 [10]

Answer:

E(Y) = 750

Step-by-step explanation:

Given

Sample Size = 2500

Percentage = 30%

Required

Calculate Mean of Y

Mean or Expected Value is calculated as thus;

E(Y) = np

Where E(Y) represents the mean

n represents the sample size (or population)

p represents the success probability

n = 2500 ; p = 30%%

p = \frac{30}{100} = 0.3

So,

E(Y) = 2500 * 0.3

E(Y) = 750

Hence, the mean value of Y is 750

3 0
2 years ago
7 divided by 4 long division
blondinia [14]
There is the answer hope it helps

3 0
3 years ago
Solve the following system of equations using Gaussian elimination method. If there are no solutions, type "N" for both xx, yy a
Anna11 [10]

Answer:

x=-224/229,

y=296/229,

z=118/229

Step-by-step explanation:

-5x-7y-4z=-6

6x+2y+3z=-2

-x+2y-7z=0...........( multiple with (-5) and sum with 1st equation, mult with 6 and                    sum with 2nd equation)

______________

-x+2y-7z=0

-17y+31z=-6.....(mult with 14)

14y-39z=-2.....(mult with -17) then sum

___________

-x+2y-7z=0

-229z=-118, so here we have z=118/229.

14y-39*(118/229)=-2, from here we have y=296/229

-x+2*(296/229)-7*(118/229)=0, we get that x=-234/229

In the same way you can do this in the matrix form>>

6 0
3 years ago
The producer of a certain bottling equipment claims that the variance of all its filled bottles is .027 or less. A sample of 30
Darya [45]

Answer:

The p-value for the test is 0.0459.

Explanation:

The question involves a chi-squared test whose p-value is to be determined.

H₀: σ² ≤ 0.027   (null hypothesis)

H₁: σ² > 0.027    (alternative hypothesis)

Standard deviation = s = 0.2

Hence, s² = (0.2)² = 0.04

Sample size = n = 30

Degree of freedom = n - 1 = 30 - 1 = 29

Significance level = 0.05

Test statistic: X² = (n - 1)s² / σ²

                           = (30 - 1) x 0.04 / 0.027

                           = 42.9629

The p-value can now be determined using the Excel function:

CHISQ.DIST.RT(42.9629,29)  = 0.0459

Hence, the p-value for the test is 0.0459.

3 0
3 years ago
Read 2 more answers
1. What is the measure in radians for the central angle of a circle whose radius is 6 cm and intercept arc length is 5.4 cm?
fgiga [73]
Hello!

1.
find circumferece
c=2pir
c=2*6*pi=12pi
intercept is 5.4

2pi radians=all

part/whole=part/whole
5.4/12pi=x/2pi
times both sides by 12pi
5.4=6x
divide both sides by 6
0.9=x
answer is 0.9 radians



2. 
assuming 9pi/5 radians

find circumference
c=2pir
c=2*26.9*pi
c=53.8pi

arc/circumference=(9pi/5)/2pi

x/(53.8pi)=(9pi/5)/(2pi)
x/(53.8pi)=18/5
times both sides by 53.8pi
x=608.46266 m
about x=608.46 m


Hope this Helps! Have A Wonderful Day! :) 
5 0
3 years ago
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