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vekshin1
2 years ago
7

Please I need help on this math question?

Mathematics
1 answer:
Oksi-84 [34.3K]2 years ago
3 0
Hi I need a answer on a math question
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​it's believed that as many as 2222​% of adults over 50 never graduated from high school. we wish to see if this percentage is t
jenyasd209 [6]

The given values are:

p =  22% = 0.22

Zc = 1.645 at 90% confidence level.

margin of error, E = 0.04

 

The formula we can use here is:

E = sqrt(pq/n) * Zc

 0.04 = sqrt(0.22*(1-0.22)/n)*1.645

n = (0.22*(1-0.22))*(1.645/0.04)^2

n = 290.22

 

hence minimum sample size = 290 

7 0
2 years ago
What is the value for x in the diagram? Rounded to the nearest whole<br> degree.
AnnZ [28]

Answer:

49

Step-by-step explanation:

cos(x)=31/47

x=cos^-1 (31/47)

8 0
3 years ago
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Can someone help me with this <br> 1+2x&lt;9 ​
riadik2000 [5.3K]

Answer:

x < 4

Step-by-step explanation:

We have that: 1 + 2x < 9. Let's solve this as if the < sign was an = sign:

1 + 2x < 9

Isolate the variable:

2x < 9 - 1

2x < 8

Divide by 2:

x < 8/2

x < 4

The answer is x < 4.

6 0
3 years ago
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5+(x-5)=x justify each step
max2010maxim [7]

5+(x-5)=x

Simplify the left side by combining like terms:

5 + x - 5 = x

5-5 = 0

x = x

X = All real numbers.

4 0
3 years ago
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Which of the following statements is not correct?
NeX [460]

Answer:

The highest percentage of teenagers in the sample

listed soccer as their favorite sport.

Basketball

Lacrosse

Soccer

Football

Step-by-step explanation:

4 0
2 years ago
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