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Iteru [2.4K]
4 years ago
14

Is this a true statement, 1/3z + 2/3z * 9 = 9z

Mathematics
1 answer:
stealth61 [152]4 years ago
5 0
Yes, I’m pretty sure.
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A random sample of 700 home owners in a particular city found 112 home owners who had a swimming pool in their backyard. Find a
vekshin1

Answer: (13.28\%,\ 18.72\%)

Step-by-step explanation:

Given : A random sample of 700 home owners in a particular city found 112 home owners who had a swimming pool in their backyard.

i.e. n= 700 and x= 112

Sample proportion : \hat{p}=\dfrac{x}{n}=\dfrac{112}{700}=0.16

z-value for 95% confidence interval : z_c=1.960

Now, the 95% confidence interval for the true percent of home owners in this city who have a swimming pool in their backyard will be :-

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

=0.16\pm (1.96)\sqrt{\dfrac{0.16(1-0.16)}{700}}

=0.16\pm (1.96)(0.013856)\\\\\approx 0.16\pm0.0272\\\\ =(0.16-0.0272,\ 0.16+0.0272)=(0.1328,\ 0.1872)=(13.28\%,\ 18.72\%)

Hence, 95% confidence interval for the true percent of home owners in this city who have a swimming pool in their backyard : (13.28\%,\ 18.72\%)

6 0
3 years ago
Find the sales tax for three cds if each cd is $14.29 and the sales tax is 7.25%
mestny [16]
14.29 * .0725 = 1.04
1.04 * 3 = 3.12
8 0
4 years ago
Read 2 more answers
D(A−N)=Q <br> solve for A
Vladimir79 [104]

Answer:

A= Q/d +N

Step-by-step explanation:

First you want to move the d term over by dividing both sides

Next you can move the N over by adding it to both sides.

3 0
1 year ago
Read 2 more answers
:D that time of day plz help on my math
Dahasolnce [82]

Answer:

200 275  125 50  100 50= 800

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
God why can't I understand thus stuff
damaskus [11]
Hey there,
For this question, you need to find the lowest common multiple which in this case is 60. 
How i got it?
5= 1 x 5
12= 2 square x 3
Since one is common, take 5 x 2 square x 3 which is equal to 60

Hope you get it :))

You can ask me any doubts if you have :))

~Top
7 0
3 years ago
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