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dem82 [27]
2 years ago
12

Determine x in the following equation 2x - 4 = 10

Mathematics
1 answer:
kari74 [83]2 years ago
7 0

Answer:

7

Step-by-step explanation:

10+4 = 14

14/2  = 7

x = 7

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Joe heard from a reliable source that only 22% of people actually sleep 8 hours or more per night. You do a survey and find 58 o
Juliette [100K]

Answer:

95% Confidence interval:  (31.32%,47.04%)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 148

Number of people who sleep for 8 hours or longer, x = 58

\hat{p} = \dfrac{x}{n} = \dfrac{58}{148} = 0.3918

95% Confidence interval:

\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting the values, we get:

0.3918\pm 1.96(\sqrt{\dfrac{0.3918(1-0.3918)}{148}})\\\\ = 0.3918\pm 0.0786\\\\=(0.3132,0.4704)=(31.32\%,47.04\%)

(31.32%,47.04%)  is the required 95% confidence interval.

8 0
3 years ago
1
kirza4 [7]
Each game was $44.99, if she spent a total of 284.97 and we subtract the cost of the console 284.97 - 194.99 = 89.98, since the two games were equally priced we divide 89.98/2 and get $44.98
8 0
3 years ago
​3 ​/​10 ​​ = ​9 /​k ​​ what is k
NemiM [27]
In order to isolate k, we would first cross multiply
3*k=9*10
3k=90

Then to isolate k, we would divide both sides by 3 to get:
K=30

Hope this helps
3 0
3 years ago
Read 2 more answers
Is 1/3x-2y=7 a linear function
Ann [662]

Answer:

The equation is not a linear function.

5 0
3 years ago
of the 273 students in a school, 95 volunteered to work the book sale. About what percent of the students volunteered?
Whitepunk [10]
28.7% to b exact
I hope this helped you
6 0
3 years ago
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