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Rzqust [24]
3 years ago
5

Use substitution to solve the system of equations.

Mathematics
1 answer:
Kamila [148]3 years ago
5 0

the answer should be C.x=-5,y=1

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HELPP ASAPP!!!!!!!!!!!!!!!!
kati45 [8]

Answer:

y = 18

Step-by-step explanation:

7 0
4 years ago
A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time student
Butoxors [25]

Answer: (21.541,\ 23.059)

Step-by-step explanation:

The confidence interval for population mean is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

Given : Sample size : n=240 , which is a large sample , so we apply z-test .

Sample mean : \overline{x}=22.3

Standard deviation : \sigma= 6

Significance level : \alpha=1-0.95=0.05

Critical value : z_{\alpha/2}=1.960

Now, a confidence interval at the 95% level of confidence will be :-

22.3\pm(1.960)\dfrac{6}{\sqrt{240}}\\\\\approx22.3\pm0.759\\\\=(22.3-0.759,\ 22.3+0.759)\\\\=(21.541,\ 23.059)

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4 years ago
Find the radians and degrees with the given problem
Vlad [161]
The answer is 5.75.Not exact but close
3 0
4 years ago
Due tomorrow deeply appreciated if done
fiasKO [112]
This is unreadable try submitting a more clear picture. i can bairly read the first problem i think it says 8(3x+4)=2(17x????)
6 0
4 years ago
Mr. Lane is 6 feet 4 inches tall. His daughter, Mary, is 3 feet 8 inches shorter than her father. His son is 9 inches taller tha
algol [13]
2 feet and 1 in. Explanation is subtract 3’8 from 6’4 then add 9in too it. Feet can only go to 12in. But you’ll get 3’4. Then add 9 and you’ll get 3’13 so you’ll get 4’1 and then just subtract that from 6’4 and you get 2’1
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4 years ago
Read 2 more answers
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